{"id":1366,"date":"2024-06-02T22:24:42","date_gmt":"2024-06-02T22:24:42","guid":{"rendered":""},"modified":"2024-06-05T03:09:46","modified_gmt":"2024-06-04T19:09:46","slug":"underscore-%e7%b3%bb%e5%88%97%e4%b9%8b%e5%ae%9e%e7%8e%b0%e4%b8%80%e4%b8%aa%e6%a8%a1%e6%9d%bf%e5%bc%95%e6%93%8e%e4%b8%8a","status":"publish","type":"post","link":"https:\/\/www.lccc.top\/?p=1366","title":{"rendered":"underscore \u7cfb\u5217\u4e4b\u5b9e\u73b0\u4e00\u4e2a\u6a21\u677f\u5f15\u64ce(\u4e0a)"},"content":{"rendered":"\n

\u524d\u8a00<\/h2>\n

underscore \u63d0\u4f9b\u4e86\u6a21\u677f\u5f15\u64ce\u7684\u529f\u80fd\uff0c\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n

<\/p>\n
var<\/span> tpl<\/span> =<\/span> \"hello: <%= name %>\"<\/span>;<\/span>\n\nvar<\/span> compiled<\/span> =<\/span> _<\/span>.<\/span>template<\/span>(<\/span>tpl<\/span>)<\/span>;<\/span>\ncompiled<\/span>(<\/span>{<\/span>name<\/span>: 'Kevin'<\/span>}<\/span>)<\/span>;<\/span> \/\/ \"hello: Kevin\"<\/span><\/pre>\n<\/div>\n
\u611f\u89c9\u597d\u50cf\u6ca1\u6709\u4ec0\u4e48\u5f3a\u5927\u7684\u5730\u65b9\uff0c\u518d\u6765\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
\u5728 HTML \u6587\u4ef6\u4e2d\uff1a<\/p>\n
<\/p>\n
<<\/span>ul<\/span> id<\/span>=\"name_list<\/span>\"><\/span><\/<\/span>ul<\/span>><\/span>\n\n<<\/span>script<\/span> type<\/span>=\"text\/html<\/span>\" id<\/span>=\"user_tmpl<\/span>\"><\/span>\n    <<\/span>%<\/span>for<\/span> (<\/span> var<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> users<\/span>.<\/span>length<\/span>;<\/span> i<\/span>++<\/span> )<\/span> {<\/span> %<\/span>><\/span>\n        <<\/span>li<\/span>><\/span>\n            <<\/span>a<\/span> href<\/span>=<\/span>\"<%=users[i].url%>\"<\/span>><\/span>\n                <<\/span>%=<\/span>users<\/span>[<\/span>i<\/span>]<\/span>.<\/span>name<\/span>%<\/span>><\/span>\n            <<\/span>\/<\/span>a<\/span>><\/span>\n        <<\/span>\/<\/span>li<\/span>><\/span>\n    <<\/span>%<\/span> }<\/span> %<\/span>><\/span>\n<\/<\/span>script<\/span>><\/span><\/pre>\n<\/div>\n
JavaScript \u6587\u4ef6\u4e2d\uff1a<\/p>\n
<\/p>\n
var<\/span> container<\/span> =<\/span> document<\/span>.<\/span>getElementById<\/span>(<\/span>\"name_list\"<\/span>)<\/span>;<\/span>\n\nvar<\/span> data<\/span> =<\/span> {<\/span>\n    users<\/span>: [<\/span>\n        {<\/span> \"name\"<\/span>: \"Kevin\"<\/span>,<\/span> \"url\"<\/span>: \"http:\/\/localhost\"<\/span> }<\/span>,<\/span>\n        {<\/span> \"name\"<\/span>: \"Daisy\"<\/span>,<\/span> \"url\"<\/span>: \"http:\/\/localhost\"<\/span> }<\/span>,<\/span>\n        {<\/span> \"name\"<\/span>: \"Kelly\"<\/span>,<\/span> \"url\"<\/span>: \"http:\/\/localhost\"<\/span> }<\/span>\n    ]<\/span>\n}<\/span>\nvar<\/span> precompile<\/span> =<\/span> _<\/span>.<\/span>template<\/span>(<\/span>document<\/span>.<\/span>getElementById<\/span>(<\/span>\"user_tmpl\"<\/span>)<\/span>.<\/span>innerHTML<\/span>)<\/span>;<\/span>\nvar<\/span> html<\/span> =<\/span> precompile<\/span>(<\/span>data<\/span>)<\/span>;<\/span>\n\ncontainer<\/span>.<\/span>innerHTML<\/span> =<\/span> html<\/span>;<\/span><\/pre>\n<\/div>\n
\u6548\u679c\u4e3a\uff1a<\/p>\n
\"\u6a21\u677f\u5f15\u64ce\u6548\u679c\"<\/a><\/p>\n
\u90a3\u4e48\u8be5\u5982\u4f55\u5b9e\u73b0\u8fd9\u6837\u4e00\u4e2a _.template \u51fd\u6570\u5462\uff1f<\/p>\n
\u5b9e\u73b0\u601d\u8def<\/h2>\n
underscore \u7684 template \u51fd\u6570\u53c2\u8003\u4e86 jQuery \u7684\u4f5c\u8005 John Resig \u5728 2008 \u5e74\u53d1\u8868\u7684\u4e00\u7bc7\u6587\u7ae0 JavaScript Micro-Templating<\/a>\uff0c\u6211\u4eec\u5148\u4ece\u8fd9\u7bc7\u6587\u7ae0\u7684\u601d\u8def\u51fa\u53d1\uff0c\u601d\u8003\u4e00\u4e0b\u5982\u4f55\u5199\u4e00\u4e2a\u7b80\u5355\u7684\u6a21\u677f\u5f15\u64ce\u3002<\/p>\n
\u4f9d\u7136\u662f\u4ee5\u8fd9\u6bb5\u6a21\u677f\u5b57\u7b26\u4e32\u4e3a\u4f8b\uff1a<\/p>\n
<\/p>\n
<<\/span>%<\/span>for<\/span> (<\/span> var<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> users<\/span>.<\/span>length<\/span>;<\/span> i<\/span>++<\/span> )<\/span> {<\/span> %<\/span>><\/span>\n    <<\/span>li<\/span>><\/span>\n        <<\/span>a<\/span> href<\/span>=<\/span>\"<%=users[i].url%>\"<\/span>><\/span>\n            <<\/span>%=<\/span>users<\/span>[<\/span>i<\/span>]<\/span>.<\/span>name<\/span>%<\/span>><\/span>\n        <<\/span>\/<\/span>a<\/span>><\/span>\n    <<\/span>\/<\/span>li<\/span>><\/span>\n<<\/span>%<\/span> }<\/span> %<\/span>><\/span><\/pre>\n<\/div>\n
John Resig \u7684\u601d\u8def\u662f\u5c06\u8fd9\u6bb5\u4ee3\u7801\u8f6c\u6362\u4e3a\u8fd9\u6837\u4e00\u6bb5\u7a0b\u5e8f\uff1a<\/p>\n
<\/p>\n
\/\/ \u6a21\u62df\u6570\u636e<\/span>\nvar<\/span> users<\/span> =<\/span> [<\/span>{<\/span>\"name\"<\/span>: \"Kevin\"<\/span>,<\/span> \"url\"<\/span>: \"http:\/\/localhost\"<\/span>}<\/span>]<\/span>;<\/span>\n\nvar<\/span> p<\/span> =<\/span> [<\/span>]<\/span>;<\/span>\nfor<\/span> (<\/span>var<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> users<\/span>.<\/span>length<\/span>;<\/span> i<\/span>++<\/span>)<\/span> {<\/span>\n    p<\/span>.<\/span>push<\/span>(<\/span>'<li><a href=\"'<\/span>)<\/span>;<\/span>\n    p<\/span>.<\/span>push<\/span>(<\/span>users<\/span>[<\/span>i<\/span>]<\/span>.<\/span>url<\/span>)<\/span>;<\/span>\n    p<\/span>.<\/span>push<\/span>(<\/span>'\">'<\/span>)<\/span>;<\/span>\n    p<\/span>.<\/span>push<\/span>(<\/span>users<\/span>[<\/span>i<\/span>]<\/span>.<\/span>name<\/span>)<\/span>;<\/span>\n    p<\/span>.<\/span>push<\/span>(<\/span>'<\/a><\/li>'<\/span>)<\/span>;<\/span>\n}<\/span>\n\n\/\/ \u6700\u540e join \u4e00\u4e0b\u5c31\u53ef\u4ee5\u5f97\u5230\u6700\u7ec8\u62fc\u63a5\u597d\u7684\u6a21\u677f\u5b57\u7b26\u4e32<\/span>\nconsole<\/span>.<\/span>log<\/span>(<\/span>p<\/span>.<\/span>join<\/span>(<\/span>''<\/span>)<\/span>)<\/span> \/\/ <li><a href=\"http:\/\/localhost\">Kevin<\/a><\/li><\/span><\/pre>\n<\/div>\n
\u6211\u4eec\u6ce8\u610f\uff0c\u6a21\u677f\u5176\u5b9e\u662f\u4e00\u6bb5\u5b57\u7b26\u4e32\uff0c\u6211\u4eec\u600e\u4e48\u6839\u636e\u4e00\u6bb5\u5b57\u7b26\u4e32\u751f\u6210\u4e00\u6bb5\u4ee3\u7801\u5462\uff1f\u5f88\u5bb9\u6613\u5c31\u60f3\u5230\u7528 eval\uff0c\u90a3\u6211\u4eec\u5c31\u5148\u7528 eval \u5427\u3002<\/p>\n
\u7136\u540e\u6211\u4eec\u4f1a\u53d1\u73b0\uff0c\u4e3a\u4e86\u8f6c\u6362\u6210\u8fd9\u6837\u4e00\u6bb5\u4ee3\u7801\uff0c\u6211\u4eec\u9700\u8981\u5c06<%xxx%><\/code>\u8f6c\u6362\u4e3a xxx<\/code>\uff0c\u5176\u5b9e\u5c31\u662f\u53bb\u6389\u5305\u88f9\u7684\u7b26\u53f7\uff0c\u8fd8\u8981\u5c06 <%=xxx%><\/code>\u8f6c\u5316\u6210 p.push(xxx)<\/code>\uff0c\u8fd9\u4e9b\u90fd\u53ef\u4ee5\u7528\u6b63\u5219\u5b9e\u73b0\uff0c\u4f46\u662f\u6211\u4eec\u8fd8\u9700\u8981\u5199 p.push('<li><a href=\"');<\/code> \u3001p.push('\">');<\/code>\u5450\uff0c\u8fd9\u4e9b\u8be5\u5982\u4f55\u5b9e\u73b0\u5462\uff1f<\/p>\n
\u90a3\u6211\u4eec\u6362\u4e2a\u601d\u8def\uff0c\u4f9d\u7136\u662f\u7528\u6b63\u5219\uff0c\u4f46\u662f\u6211\u4eec<\/p>\n
    \n
  1. \u5c06 %><\/code> \u66ff\u6362\u6210 p.push('<\/code><\/li>\n
  2. \u5c06 <%<\/code> \u66ff\u6362\u6210 ');<\/code><\/li>\n
  3. \u5c06 <%=xxx%><\/code> \u66ff\u6362\u6210 ');p.push(xxx);p.push('<\/code><\/li>\n<\/ol>\n
    \u6211\u4eec\u6765\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
    <\/p>\n
    <%for ( var i = 0; i < users.length; i++ ) { %>\n    <li>\n        <a href=\"<%=users[i].url%>\">\n            <%=users[i].name%>\n        <\/a>\n    <\/li>\n<% } %>\n<\/code><\/pre>\n<\/div>\n
    \u6309\u7167\u8fd9\u4e2a\u66ff\u6362\u89c4\u5219\u4f1a\u88ab\u66ff\u6362\u4e3a\uff1a<\/p>\n
    <\/p>\n
    ');for ( var i = 0; i < users.length; i++ ) { p.push('\n    <li>\n        <a href=\"');p.push(users[i].url);p.push('\">\n            ');p.push(users[i].name);p.push('\n        <\/a>\n    <\/li>\n'); } p.push('\n<\/code><\/pre>\n<\/div>\n
    \u8fd9\u6837\u80af\u5b9a\u4f1a\u62a5\u9519\uff0c\u6bd5\u7adf\u4ee3\u7801\u90fd\u6ca1\u6709\u5199\u5168\uff0c\u6211\u4eec\u5728\u9996\u548c\u5c3e\u52a0\u4e0a\u90e8\u5206\u4ee3\u7801\uff0c\u53d8\u6210\uff1a<\/p>\n
    <\/p>\n
    \/\/ \u6dfb\u52a0\u7684\u9996\u90e8\u4ee3\u7801\nvar p = []; p.push('\n\n');for ( var i = 0; i < users.length; i++ ) { p.push('\n    <li>\n        <a href=\"');p.push(users[i].url);p.push('\">\n            ');p.push(users[i].name);p.push('\n        <\/a>\n    <\/li>\n'); } p.push('\n\n\/\/ \u6dfb\u52a0\u7684\u5c3e\u90e8\u4ee3\u7801\n');\n<\/code><\/pre>\n<\/div>\n
    \u6211\u4eec\u6574\u7406\u4e0b\u8fd9\u6bb5\u4ee3\u7801\uff1a<\/p>\n
    <\/p>\n
    var<\/span> p<\/span> =<\/span> [<\/span>]<\/span>;<\/span> p<\/span>.<\/span>push<\/span>(<\/span>''<\/span>)<\/span>;<\/span>\nfor<\/span> (<\/span> var<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> users<\/span>.<\/span>length<\/span>;<\/span> i<\/span>++<\/span> )<\/span> {<\/span> \n    p<\/span>.<\/span>push<\/span>(<\/span>'<li><a href=\"'<\/span>)<\/span>;<\/span>\n    p<\/span>.<\/span>push<\/span>(<\/span>users<\/span>[<\/span>i<\/span>]<\/span>.<\/span>url<\/span>)<\/span>;<\/span>\n    p<\/span>.<\/span>push<\/span>(<\/span>'\">'<\/span>)<\/span>;<\/span>\n    p<\/span>.<\/span>push<\/span>(<\/span>users<\/span>[<\/span>i<\/span>]<\/span>.<\/span>name<\/span>)<\/span>;<\/span>\n    p<\/span>.<\/span>push<\/span>(<\/span>'<\/a><\/li>'<\/span>)<\/span>;<\/span> \n}<\/span>\n    p<\/span>.<\/span>push<\/span>(<\/span>''<\/span>)<\/span>;<\/span><\/pre>\n<\/div>\n
    \u6070\u597d\u53ef\u4ee5\u5b9e\u73b0\u8fd9\u4e2a\u529f\u80fd\uff0c\u4e0d\u8fc7\u8fd8\u8981\u6ce8\u610f\u4e00\u70b9\uff0c\u8981\u5c06\u6362\u884c\u7b26\u66ff\u6362\u6210\u7a7a\u683c\uff0c\u9632\u6b62\u89e3\u6790\u6210\u4ee3\u7801\u7684\u65f6\u5019\u62a5\u9519\uff0c\u4e0d\u8fc7\u5728\u8fd9\u91cc\u4e3a\u4e86\u65b9\u4fbf\u7406\u89e3\u539f\u7406\uff0c\u5c31\u53ea\u5728\u4ee3\u7801\u91cc\u5b9e\u73b0\u3002<\/p>\n
    \u7b2c\u4e00\u7248<\/h2>\n
    \u6211\u4eec\u6765\u5c1d\u8bd5\u5b9e\u73b0\u7b2c\u4e00\u7248\uff1a<\/p>\n
    <\/p>\n
    \/\/ \u7b2c\u4e00\u7248<\/span>\nfunction<\/span> tmpl<\/span>(<\/span>str<\/span>,<\/span> data<\/span>)<\/span> {<\/span>\n    var<\/span> str<\/span> =<\/span> document<\/span>.<\/span>getElementById<\/span>(<\/span>str<\/span>)<\/span>.<\/span>innerHTML<\/span>;<\/span>\n\n    var<\/span> string<\/span> =<\/span> \"var p = []; p.push('\"<\/span> +<\/span>\n    str<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span>[\\r\\t\\n]\/<\/span>g<\/span>,<\/span> \"\"<\/span>)<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span><%=(.*?)%>\/<\/span>g<\/span>,<\/span> \"');p.push($1);p.push('\"<\/span>)<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span><%\/<\/span>g<\/span>,<\/span> \"');\"<\/span>)<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span>%>\/<\/span>g<\/span>,<\/span>\"p.push('\"<\/span>)<\/span>\n    +<\/span> \"');\"<\/span>\n\n    eval<\/span>(<\/span>string<\/span>)<\/span>\n\n    return<\/span> p<\/span>.<\/span>join<\/span>(<\/span>''<\/span>)<\/span>;<\/span>\n}<\/span>;<\/span><\/pre>\n<\/div>\n
    \u4e3a\u4e86\u9a8c\u8bc1\u662f\u5426\u6709\u7528\uff1a<\/p>\n
    HTML \u6587\u4ef6\uff1a<\/p>\n
    <\/p>\n
    <<\/span>script<\/span> type<\/span>=\"text\/html<\/span>\" id<\/span>=\"user_tmpl<\/span>\"><\/span>\n    <<\/span>%<\/span>for<\/span> (<\/span> var<\/span> i<\/span> =<\/span> 0<\/span>;<\/span> i<\/span> <<\/span> users<\/span>.<\/span>length<\/span>;<\/span> i<\/span>++<\/span> )<\/span> {<\/span> %<\/span>><\/span>\n        <<\/span>li<\/span>><\/span>\n            <<\/span>a<\/span> href<\/span>=<\/span>\"<%=users[i].url%>\"<\/span>><\/span>\n                <<\/span>%=<\/span>users<\/span>[<\/span>i<\/span>]<\/span>.<\/span>name<\/span>%<\/span>><\/span>\n            <<\/span>\/<\/span>a<\/span>><\/span>\n        <<\/span>\/<\/span>li<\/span>><\/span>\n    <<\/span>%<\/span> }<\/span> %<\/span>><\/span>\n<\/<\/span>script<\/span>><\/span><\/pre>\n<\/div>\n
    JavaScript \u6587\u4ef6\uff1a<\/p>\n
    <\/p>\n
    var<\/span> users<\/span> =<\/span> [<\/span>\n    {<\/span> \"name\"<\/span>: \"Byron\"<\/span>,<\/span> \"url\"<\/span>: \"http:\/\/localhost\"<\/span> }<\/span>,<\/span>\n    {<\/span> \"name\"<\/span>: \"Casper\"<\/span>,<\/span> \"url\"<\/span>: \"http:\/\/localhost\"<\/span> }<\/span>,<\/span>\n    {<\/span> \"name\"<\/span>: \"Frank\"<\/span>,<\/span> \"url\"<\/span>: \"http:\/\/localhost\"<\/span> }<\/span>\n]<\/span>\ntmpl<\/span>(<\/span>\"user_tmpl\"<\/span>,<\/span> users<\/span>)<\/span><\/pre>\n<\/div>\n
    \u5b8c\u6574\u7684 Demo \u53ef\u4ee5\u67e5\u770b template \u793a\u4f8b\u4e00<\/a><\/p>\n
    Function<\/h2>\n
    \u5728\u8fd9\u91cc\u6211\u4eec\u4f7f\u7528\u4e86 eval \uff0c\u5b9e\u9645\u4e0a John Resig \u5728\u6587\u7ae0\u4e2d\u4f7f\u7528\u7684\u662f Function \u6784\u9020\u51fd\u6570\u3002<\/p>\n
    Function \u6784\u9020\u51fd\u6570\u521b\u5efa\u4e00\u4e2a\u65b0\u7684 Function \u5bf9\u8c61\u3002 \u5728 JavaScript \u4e2d, \u6bcf\u4e2a\u51fd\u6570\u5b9e\u9645\u4e0a\u90fd\u662f\u4e00\u4e2a Function \u5bf9\u8c61\u3002<\/p>\n
    \u4f7f\u7528\u65b9\u6cd5\u4e3a\uff1a<\/p>\n
    \n
    new<\/span> Function<\/span> (<\/span>[<\/span>arg1<\/span>[<\/span>,<\/span> arg2<\/span>[<\/span>,<\/span> ...argN<\/span>]<\/span>]<\/span>,<\/span>]<\/span> functionBody<\/span>)<\/span><\/pre>\n<\/div>\n
    arg1, arg2, … argN \u8868\u793a\u51fd\u6570\u7528\u5230\u7684\u53c2\u6570\uff0cfunctionBody \u8868\u793a\u4e00\u4e2a\u542b\u6709\u5305\u62ec\u51fd\u6570\u5b9a\u4e49\u7684 JavaScript \u8bed\u53e5\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n
    \u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n
    <\/p>\n
    var<\/span> adder<\/span> =<\/span> new<\/span> Function<\/span>(<\/span>\"a\"<\/span>,<\/span> \"b\"<\/span>,<\/span> \"return a + b\"<\/span>)<\/span>;<\/span>\n\nadder<\/span>(<\/span>2<\/span>,<\/span> 6<\/span>)<\/span>;<\/span> \/\/ 8<\/span><\/pre>\n<\/div>\n
    \u90a3\u4e48 John Resig \u5230\u5e95\u662f\u5982\u4f55\u5b9e\u73b0\u7684\u5462\uff1f<\/p>\n
    \u7b2c\u4e8c\u7248<\/h2>\n
    \u4f7f\u7528 Function \u6784\u9020\u51fd\u6570\uff1a<\/p>\n
    <\/p>\n
    \/\/ \u7b2c\u4e8c\u7248<\/span>\nfunction<\/span> tmpl<\/span>(<\/span>str<\/span>,<\/span> data<\/span>)<\/span> {<\/span>\n    var<\/span> str<\/span> =<\/span> document<\/span>.<\/span>getElementById<\/span>(<\/span>str<\/span>)<\/span>.<\/span>innerHTML<\/span>;<\/span>\n\n    var<\/span> fn<\/span> =<\/span> new<\/span> Function<\/span>(<\/span>\"obj\"<\/span>,<\/span>\n\n    \"var p = []; p.push('\"<\/span> +<\/span>\n\n    str<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span>[\\r\\t\\n]\/<\/span>g<\/span>,<\/span> \"\"<\/span>)<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span><%=(.*?)%>\/<\/span>g<\/span>,<\/span> \"');p.push($1);p.push('\"<\/span>)<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span><%\/<\/span>g<\/span>,<\/span> \"');\"<\/span>)<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span>%>\/<\/span>g<\/span>,<\/span>\"p.push('\"<\/span>)<\/span>\n    +<\/span> \"');return p.join('');\"<\/span>)<\/span>;<\/span>\n\n    return<\/span> fn<\/span>(<\/span>data<\/span>)<\/span>;<\/span>\n}<\/span>;<\/span><\/pre>\n<\/div>\n
    \u4f7f\u7528\u65b9\u6cd5\u4f9d\u7136\u8ddf\u7b2c\u4e00\u7248\u76f8\u540c\uff0c\u5177\u4f53 Demo \u53ef\u4ee5\u67e5\u770b template \u793a\u4f8b\u4e8c<\/a><\/p>\n
    \u4e0d\u8fc7\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff1a\u5176\u5b9e tmpl \u51fd\u6570\u6ca1\u6709\u5fc5\u8981\u4f20\u5165 data \u53c2\u6570\uff0c\u4e5f\u6ca1\u6709\u5fc5\u8981\u5728\u6700\u540e return \u7684\u65f6\u5019\uff0c\u4f20\u5165 data \u53c2\u6570\uff0c\u5373\u4f7f\u4f60\u628a\u8fd9\u4e24\u4e2a\u53c2\u6570\u90fd\u53bb\u6389\uff0c\u4ee3\u7801\u8fd8\u662f\u53ef\u4ee5\u6b63\u5e38\u6267\u884c\u7684\u3002<\/p>\n
    \u8fd9\u662f\u56e0\u4e3a:<\/p>\n
    \n
    \u4f7f\u7528Function\u6784\u9020\u5668\u751f\u6210\u7684\u51fd\u6570\uff0c\u5e76\u4e0d\u4f1a\u5728\u521b\u5efa\u5b83\u4eec\u7684\u4e0a\u4e0b\u6587\u4e2d\u521b\u5efa\u95ed\u5305\uff1b\u5b83\u4eec\u4e00\u822c\u5728\u5168\u5c40\u4f5c\u7528\u57df\u4e2d\u88ab\u521b\u5efa\u3002\u5f53\u8fd0\u884c\u8fd9\u4e9b\u51fd\u6570\u7684\u65f6\u5019\uff0c\u5b83\u4eec\u53ea\u80fd\u8bbf\u95ee\u81ea\u5df1\u7684\u672c\u5730\u53d8\u91cf\u548c\u5168\u5c40\u53d8\u91cf\uff0c\u4e0d\u80fd\u8bbf\u95eeFunction\u6784\u9020\u5668\u88ab\u8c03\u7528\u751f\u6210\u7684\u4e0a\u4e0b\u6587\u7684\u4f5c\u7528\u57df\u3002\u8fd9\u548c\u4f7f\u7528\u5e26\u6709\u51fd\u6570\u8868\u8fbe\u5f0f\u4ee3\u7801\u7684 eval \u4e0d\u540c\u3002<\/p>\n<\/blockquote>\n
    \u8fd9\u91cc\u4e4b\u6240\u4ee5\u4f9d\u7136\u4f20\u5165\u4e86 data \u53c2\u6570\uff0c\u662f\u4e3a\u4e86\u4e0b\u4e00\u7248\u505a\u51c6\u5907\u3002<\/p>\n
    with<\/h2>\n
    \u73b0\u5728\u6709\u4e00\u4e2a\u5c0f\u95ee\u9898\uff0c\u5c31\u662f\u5b9e\u9645\u4e0a\u6211\u4eec\u4f20\u5165\u7684\u6570\u636e\u7ed3\u6784\u53ef\u80fd\u6bd4\u8f83\u590d\u6742\uff0c\u6bd4\u5982\uff1a<\/p>\n
    <\/p>\n
    var<\/span> data<\/span> =<\/span> {<\/span>\n    status<\/span>: 200<\/span>,<\/span>\n    name<\/span>: 'kevin'<\/span>,<\/span>\n    friends<\/span>: [<\/span>...]<\/span>\n}<\/span><\/pre>\n<\/div>\n
    \u5982\u679c\u6211\u4eec\u5c06\u8fd9\u4e2a\u6570\u636e\u7ed3\u6784\u4f20\u5165 tmpl \u51fd\u6570\u4e2d\uff0c\u5728\u6a21\u677f\u5b57\u7b26\u4e32\u4e2d\uff0c\u5982\u679c\u8981\u7528\u5230\u67d0\u4e2a\u6570\u636e\uff0c\u603b\u662f\u9700\u8981\u4f7f\u7528 data.name<\/code>\u3001data.friends<\/code> \u7684\u5f62\u5f0f\u6765\u83b7\u53d6\uff0c\u9ebb\u70e6\u5c31\u9ebb\u70e6\u5728\u6211\u60f3\u76f4\u63a5\u4f7f\u7528 name\u3001friends \u7b49\u53d8\u91cf\uff0c\u800c\u4e0d\u662f\u7e41\u7410\u7684\u4f7f\u7528 data.<\/code> \u6765\u83b7\u53d6\u3002<\/p>\n
    \u8fd9\u53c8\u8be5\u5982\u4f55\u5b9e\u73b0\u7684\u5462\uff1f\u7b54\u6848\u662f with\u3002<\/p>\n
    with \u8bed\u53e5\u53ef\u4ee5\u6269\u5c55\u4e00\u4e2a\u8bed\u53e5\u7684\u4f5c\u7528\u57df\u94fe(scope chain)\u3002\u5f53\u9700\u8981\u591a\u6b21\u8bbf\u95ee\u4e00\u4e2a\u5bf9\u8c61\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u4f7f\u7528 with \u505a\u7b80\u5316\u3002\u6bd4\u5982\uff1a<\/p>\n
    <\/p>\n
    var<\/span> hostName<\/span> =<\/span> location<\/span>.<\/span>hostname<\/span>;<\/span>\nvar<\/span> url<\/span> =<\/span> location<\/span>.<\/span>href<\/span>;<\/span>\n\n\/\/ \u4f7f\u7528 with<\/span>\nwith<\/span>(<\/span>location<\/span>)<\/span>{<\/span>\n    var<\/span> hostname<\/span> =<\/span> hostname<\/span>;<\/span>\n    var<\/span> url<\/span> =<\/span> href<\/span>;<\/span>\n}<\/span><\/pre>\n<\/div>\n
    <\/p>\n
    function<\/span> Person<\/span>(<\/span>)<\/span>{<\/span>\n    this<\/span>.<\/span>name<\/span> =<\/span> 'Kevin'<\/span>;<\/span>\n    this<\/span>.<\/span>age<\/span> =<\/span> '18'<\/span>;<\/span>\n}<\/span>\n\nvar<\/span> person<\/span> =<\/span> new<\/span> Person<\/span>(<\/span>)<\/span>;<\/span>\n\nwith<\/span>(<\/span>person<\/span>)<\/span> {<\/span>\n    console<\/span>.<\/span>log<\/span>(<\/span>'my name is '<\/span> +<\/span> name<\/span> +<\/span> ', age is '<\/span> +<\/span> age<\/span> +<\/span> '.'<\/span>)<\/span>\n}<\/span>\n\/\/ my name is Kevin, age is 18.<\/span><\/pre>\n<\/div>\n
    \u6700\u540e\uff1a\u4e0d\u5efa\u8bae\u4f7f\u7528 with \u8bed\u53e5\uff0c\u56e0\u4e3a\u5b83\u53ef\u80fd\u662f\u6df7\u6dc6\u9519\u8bef\u548c\u517c\u5bb9\u6027\u95ee\u9898\u7684\u6839\u6e90\uff0c\u9664\u6b64\u4e4b\u5916\uff0c\u4e5f\u4f1a\u9020\u6210\u6027\u80fd\u4f4e\u4e0b<\/p>\n
    \u7b2c\u4e09\u7248<\/h2>\n
    \u4f7f\u7528 with \uff0c\u6211\u4eec\u518d\u5199\u4e00\u7248\u4ee3\u7801\uff1a<\/p>\n
    <\/p>\n
    \/\/ \u7b2c\u4e09\u7248<\/span>\nfunction<\/span> tmpl<\/span>(<\/span>str<\/span>,<\/span> data<\/span>)<\/span> {<\/span>\n    var<\/span> str<\/span> =<\/span> document<\/span>.<\/span>getElementById<\/span>(<\/span>str<\/span>)<\/span>.<\/span>innerHTML<\/span>;<\/span>\n\n    var<\/span> fn<\/span> =<\/span> new<\/span> Function<\/span>(<\/span>\"obj\"<\/span>,<\/span>\n\n    \/\/ \u5176\u5b9e\u5c31\u662f\u8fd9\u91cc\u591a\u6dfb\u52a0\u4e86\u4e00\u53e5 with(obj){...}<\/span>\n    \"var p = []; with(obj){p.push('\"<\/span> +<\/span>\n\n    str<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span>[\\r\\t\\n]\/<\/span>g<\/span>,<\/span> \"\"<\/span>)<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span><%=(.*?)%>\/<\/span>g<\/span>,<\/span> \"');p.push($1);p.push('\"<\/span>)<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span><%\/<\/span>g<\/span>,<\/span> \"');\"<\/span>)<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span>%>\/<\/span>g<\/span>,<\/span>\"p.push('\"<\/span>)<\/span>\n    +<\/span> \"');}return p.join('');\"<\/span>)<\/span>;<\/span>\n\n    return<\/span> fn<\/span>(<\/span>data<\/span>)<\/span>;<\/span>\n}<\/span>;<\/span><\/pre>\n<\/div>\n
    \u5177\u4f53 Demo \u53ef\u4ee5\u67e5\u770b template \u793a\u4f8b\u4e09<\/a><\/p>\n
    \u7b2c\u56db\u7248<\/h2>\n
    \u5982\u679c\u6211\u4eec\u7684\u6a21\u677f\u4e0d\u53d8\uff0c\u6570\u636e\u5374\u53d1\u751f\u4e86\u53d8\u5316\uff0c\u5982\u679c\u4f7f\u7528\u6211\u4eec\u7684\u4e4b\u524d\u5199\u7684 tmpl \u51fd\u6570\uff0c\u6bcf\u6b21\u90fd\u4f1a new Function\uff0c\u8fd9\u5176\u5b9e\u662f\u6ca1\u6709\u5fc5\u8981\u7684\uff0c\u5982\u679c\u6211\u4eec\u80fd\u5728\u4f7f\u7528 tmpl \u7684\u65f6\u5019\uff0c\u8fd4\u56de\u4e00\u4e2a\u51fd\u6570\uff0c\u7136\u540e\u4f7f\u7528\u8be5\u51fd\u6570\uff0c\u4f20\u5165\u4e0d\u540c\u7684\u6570\u636e\uff0c\u53ea\u6839\u636e\u6570\u636e\u4e0d\u540c\u6e32\u67d3\u4e0d\u540c\u7684 html \u5b57\u7b26\u4e32\uff0c\u5c31\u53ef\u4ee5\u907f\u514d\u8fd9\u79cd\u65e0\u8c13\u7684\u635f\u5931\u3002<\/p>\n
    <\/p>\n
    \/\/ \u7b2c\u56db\u7248<\/span>\nfunction<\/span> tmpl<\/span>(<\/span>str<\/span>,<\/span> data<\/span>)<\/span> {<\/span>\n    var<\/span> str<\/span> =<\/span> document<\/span>.<\/span>getElementById<\/span>(<\/span>str<\/span>)<\/span>.<\/span>innerHTML<\/span>;<\/span>\n\n    var<\/span> fn<\/span> =<\/span> new<\/span> Function<\/span>(<\/span>\"obj\"<\/span>,<\/span>\n\n    \"var p = []; with(obj){p.push('\"<\/span> +<\/span>\n\n    str<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span>[\\r\\t\\n]\/<\/span>g<\/span>,<\/span> \"\"<\/span>)<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span><%=(.*?)%>\/<\/span>g<\/span>,<\/span> \"');p.push($1);p.push('\"<\/span>)<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span><%\/<\/span>g<\/span>,<\/span> \"');\"<\/span>)<\/span>\n    .<\/span>replace<\/span>(<\/span>\/<\/span>%>\/<\/span>g<\/span>,<\/span>\"p.push('\"<\/span>)<\/span>\n    +<\/span> \"');}return p.join('');\"<\/span>)<\/span>;<\/span>\n\n    var<\/span> template<\/span> =<\/span> function<\/span>(<\/span>data<\/span>)<\/span> {<\/span>\n        return<\/span> fn<\/span>.<\/span>call<\/span>(<\/span>this<\/span>,<\/span> data<\/span>)<\/span>\n    }<\/span>\n    return<\/span> template<\/span>;<\/span>\n}<\/span>;<\/span>\n\n\/\/ \u4f7f\u7528\u65f6<\/span>\nvar<\/span> compiled<\/span> =<\/span> tmpl<\/span>(<\/span>\"user_tmpl\"<\/span>)<\/span>;<\/span>\nresults<\/span>.<\/span>innerHTML<\/span> =<\/span> compiled<\/span>(<\/span>data<\/span>)<\/span>;<\/span><\/pre>\n<\/div>\n
    \u5177\u4f53 Demo \u53ef\u4ee5\u67e5\u770b template \u793a\u4f8b\u56db<\/a><\/p>\n
    \u4e0b\u671f\u9884\u544a<\/h2>\n
    \u81f3\u6b64\uff0c\u6211\u4eec\u5df2\u7ecf\u8ddf\u7740 jQuery \u7684\u4f5c\u8005 John Resig \u5b9e\u73b0\u4e86\u4e00\u4e2a\u7b80\u5355\u7684\u6a21\u677f\u5f15\u64ce\uff0c\u867d\u7136 underscore \u57fa\u4e8e\u8fd9\u4e2a\u601d\u8def\u5b9e\u73b0\uff0c\u4f46\u662f\u529f\u80fd\u5f3a\u5927\uff0c\u76f8\u5bf9\u7684\uff0c\u4ee3\u7801\u4e5f\u66f4\u52a0\u590d\u6742\u4e00\u4e0b\uff0c\u4e0b\u4e00\u7bc7\uff0c\u6211\u4eec\u4e00\u8d77\u53bb\u5206\u6790 underscore \u7684 template \u51fd\u6570\u5b9e\u73b0\u3002<\/p>\n
    underscore \u7cfb\u5217<\/h2>\n
    underscore \u7cfb\u5217\u76ee\u5f55\u5730\u5740\uff1ahttps:\/\/github.com\/mqyqingfeng\/Blog<\/a>\u3002<\/p>\n
    underscore \u7cfb\u5217\u9884\u8ba1\u5199\u516b\u7bc7\u5de6\u53f3\uff0c\u91cd\u70b9\u4ecb\u7ecd underscore \u4e2d\u7684\u4ee3\u7801\u67b6\u6784\u3001\u94fe\u5f0f\u8c03\u7528\u3001\u5185\u90e8\u51fd\u6570\u3001\u6a21\u677f\u5f15\u64ce\u7b49\u5185\u5bb9\uff0c\u65e8\u5728\u5e2e\u52a9\u5927\u5bb6\u9605\u8bfb\u6e90\u7801\uff0c\u4ee5\u53ca\u5199\u51fa\u81ea\u5df1\u7684 undercore\u3002<\/p>\n<\/td>\n
    \u6587\u7ae0\u8f6c\u8f7d\u81eahttps:\/\/github.com\/mqyqingfeng\/Blog\/issues\/63<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
    \u524d\u8a00 underscore \u63d0\u4f9b\u4e86\u6a21\u677f\u5f15\u64ce\u7684\u529f\u80fd\uff0c\u4e3e\u4e2a\u4f8b\u5b50\uff1a var tpl = “hello: <%= name %>”; var compile…<\/p>\n
     Read More  Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-1366","post","type-post","status-publish","format-standard","hentry","category-learn"],"_links":{"self":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1366"}],"collection":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1366"}],"version-history":[{"count":1,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1366\/revisions"}],"predecessor-version":[{"id":1475,"href":"https:\/\/www.lccc.top\/index.php?rest_route=\/wp\/v2\/posts\/1366\/revisions\/1475"}],"wp:attachment":[{"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1366"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1366"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lccc.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1366"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}