{"id":306222,"date":"2024-05-20T20:04:48","date_gmt":"2024-05-20T12:04:48","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/306222.html"},"modified":"2024-05-20T20:05:01","modified_gmt":"2024-05-20T12:05:01","slug":"%e5%89%8d%e7%ab%af-jquery-%e9%a1%b9%e7%9b%ae%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-getpropbypath-%e5%87%bd%e6%95%b0-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/306222.html","title":{"rendered":"\u524d\u7aef jquery \u9879\u76ee\u5982\u4f55\u4f7f\u7528 getPropByPath \u51fd\u6570"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/26222602\/6352b15f-0669-46f0-b4b3-9a23b22f33d5.webp\" alt=\"\u524d\u7aef jquery \u9879\u76ee\u5982\u4f55\u4f7f\u7528 getPropByPath \u51fd\u6570\" \/><\/p>\n<p><p>GETPROPBYPATH \u51fd\u6570\u662f\u4e00\u4e2a\u5b9e\u7528\u7684\u5de5\u5177\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u5e2e\u52a9\u4f60\u5728\u524d\u7aef jQuery \u9879\u76ee\u4e2d\u4fbf\u6377\u5730\u83b7\u53d6\u5bf9\u8c61\u7684\u5d4c\u5957\u5c5e\u6027\u3002\u4f7f\u7528\u8fd9\u4e00\u51fd\u6570\uff0c\u4f60\u53ef\u4ee5\u901a\u8fc7\u5b57\u7b26\u4e32\u8def\u5f84\u6765\u5b89\u5168\u5730\u8bbf\u95ee\u6df1\u5c42\u5d4c\u5957\u5bf9\u8c61\u5c5e\u6027\uff0c<strong>\u4e3b\u8981\u4f5c\u7528\u662f\u907f\u514d\u56e0\u76f4\u63a5\u8bbf\u95ee\u5c5e\u6027\u5bfc\u81f4\u7684\u9519\u8bef<\/strong>\u3001<strong>\u63d0\u9ad8\u4ee3\u7801\u7684\u5065\u58ee\u6027\uff0c\u4ee5\u53ca\u7b80\u5316\u4ee3\u7801\u590d\u6742\u5ea6<\/strong>\u3002\u4e3a\u4e86\u8be6\u7ec6\u89e3\u91ca\u5982\u4f55\u5728\u9879\u76ee\u4e2d\u4f7f\u7528\u8fd9\u4e00\u51fd\u6570\uff0c\u6211\u4eec\u9996\u5148\u4f1a\u5b9a\u4e49\u51fd\u6570\u672c\u8eab\uff0c\u7136\u540e\u6f14\u793a\u5b83\u7684\u7528\u6cd5\u548c\u4e00\u4e9b\u5e38\u89c1\u7684\u5e94\u7528\u573a\u666f\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001GETPROPBYPATH \u51fd\u6570\u5b9a\u4e49<\/h3>\n<\/p>\n<p><p><strong>\u5b9a\u4e49\u51fd\u6570<\/strong>:<\/p>\n<p>\u4e3a\u4e86\u4f7f\u7528 GETPROPBYPATH \u51fd\u6570\uff0c\u9996\u5148\u9700\u8981\u5b9a\u4e49\u5b83\u3002\u8fd9\u4e2a\u51fd\u6570\u63a5\u6536\u4e24\u4e2a\u53c2\u6570\uff1a\u7b2c\u4e00\u4e2a\u662f\u76ee\u6807\u5bf9\u8c61\uff0c\u7b2c\u4e8c\u4e2a\u662f\u5c5e\u6027\u8def\u5f84\u5b57\u7b26\u4e32\u3002\u4ee5\u4e0b\u662f\u51fd\u6570\u7684\u57fa\u672c\u5b9e\u73b0\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">function getPropByPath(obj, path) {<\/p>\n<p>    var paths = path.split(&#039;.&#039;);<\/p>\n<p>    var current = obj;<\/p>\n<p>    var result = null;<\/p>\n<p>    for (var i = 0; i &lt; paths.length; ++i) {<\/p>\n<p>        if(current[paths[i]] == undefined) {<\/p>\n<p>            return undefined;<\/p>\n<p>        } else {<\/p>\n<p>            current = current[paths[i]];<\/p>\n<p>            result = current;<\/p>\n<p>        }<\/p>\n<p>    }<\/p>\n<p>    return result;<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p><strong>\u7406\u89e3\u51fd\u6570\u903b\u8f91<\/strong>:<\/p>\n<p>\u51fd\u6570\u5185\u90e8\uff0c\u9996\u5148\u901a\u8fc7\u70b9\u5206\u9694\u7b26\u62c6\u5206\u5c5e\u6027\u8def\u5f84\u5b57\u7b26\u4e32\uff0c\u7136\u540e\u5faa\u73af\u904d\u5386\u8def\u5f84\u7684\u5404\u4e2a\u90e8\u5206\uff0c\u5e76\u9010\u6b65\u6df1\u5165\u5230\u76ee\u6807\u5bf9\u8c61\u7684\u5185\u90e8\u3002\u5982\u679c\u5728\u4efb\u610f\u5c42\u7ea7\u4e0a\u67d0\u4e2a\u5c5e\u6027\u4e0d\u5b58\u5728\uff0c\u5219\u51fd\u6570\u8fd4\u56de <code>undefined<\/code>\uff0c\u4ece\u800c\u907f\u514d\u4e86\u7a0b\u5e8f\u629b\u51fa\u9519\u8bef\u3002\u6700\u7ec8\uff0c\u5982\u679c\u6210\u529f\u5230\u8fbe\u8def\u5f84\u7684\u672b\u7aef\uff0c\u51fd\u6570\u8fd4\u56de\u627e\u5230\u7684\u5c5e\u6027\u503c\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u5982\u4f55\u5728 jQuery \u9879\u76ee\u4e2d\u4f7f\u7528<\/h3>\n<\/p>\n<p><p><strong>\u5f15\u5165\u51fd\u6570<\/strong>:<\/p>\n<p>\u5728 jQuery \u9879\u76ee\u4e2d\u4f7f\u7528 GETPROPBYPATH \u51fd\u6570\u4e4b\u524d\uff0c\u4f60\u5e94\u8be5\u786e\u4fdd\u8fd9\u4e2a\u51fd\u6570\u5df2\u7ecf\u5728\u4f60\u7684\u811a\u672c\u6587\u4ef6\u4e2d\u88ab\u5b9a\u4e49\uff0c\u5e76\u4e14\u5728\u4f60\u5c1d\u8bd5\u4f7f\u7528\u5b83\u4e4b\u524d\u5b83\u5df2\u7ecf\u88ab\u52a0\u8f7d\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">$(document).ready(function () {<\/p>\n<p>    \/\/ \u4f7f\u7528 getPropByPath \u51fd\u6570\u4e4b\u524d\u80fd\u786e\u4fdd\u5b83\u5df2\u52a0\u8f7d<\/p>\n<p>});<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p><strong>\u8c03\u7528\u51fd\u6570<\/strong>:<\/p>\n<p>\u5728\u5b9e\u73b0\u4e86 GETPROPBYPATH \u51fd\u6570\u4e4b\u540e\uff0c\u4f60\u53ef\u4ee5\u5728\u9879\u76ee\u7684\u4efb\u4f55\u5730\u65b9\u8c03\u7528\u5b83\u3002\u8fd9\u5728\u5904\u7406\u590d\u6742\u7684 JSON \u6570\u636e\u7ed3\u6784\u65f6\u5c24\u5176\u6709\u7528\uff0c\u6bd4\u5982\u4ece AJAX \u54cd\u5e94\u4e2d\u83b7\u53d6\u6570\u636e\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">$.ajax({<\/p>\n<p>    url: &#039;some-api-endpoint&#039;,<\/p>\n<p>    method: &#039;GET&#039;,<\/p>\n<p>    success: function(data) {<\/p>\n<p>        var value = getPropByPath(data, &#039;user.profile.name&#039;);<\/p>\n<p>        if(value !== undefined){<\/p>\n<p>            $(&#039;#username&#039;).text(value);<\/p>\n<p>        }<\/p>\n<p>    }<\/p>\n<p>});<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><h3>\u4e09\u3001\u5e38\u89c1\u7684\u5e94\u7528\u573a\u666f<\/h3>\n<\/p>\n<p><p><strong>\u5904\u7406 AJAX \u54cd\u5e94<\/strong>:<\/p>\n<p>\u5728\u4e0e\u670d\u52a1\u7aef\u8fdb\u884c AJAX \u901a\u4fe1\u65f6\uff0c\u4f60\u53ef\u80fd\u4f1a\u63a5\u6536\u5230\u590d\u6742\u7684 JSON \u5bf9\u8c61\u3002\u4f7f\u7528 GETPROPBYPATH \u51fd\u6570\u53ef\u4ee5\u5e2e\u4f60\u5b89\u5168\u5730\u8bbf\u95ee\u8fd9\u4e9b\u5bf9\u8c61\u4e2d\u5d4c\u5957\u7684\u5c5e\u6027\u3002<\/p>\n<\/p>\n<p><p><strong>\u72b6\u6001\u7ba1\u7406<\/strong>:<\/p>\n<p>\u5982\u679c\u4f60\u5728\u9879\u76ee\u4e2d\u4f7f\u7528\u4e86\u5168\u5c40\u72b6\u6001\u7ba1\u7406\uff08\u4f8b\u5982 Redux \u6216\u8005 VueX\uff09\uff0cGETPROPBYPATH \u51fd\u6570\u53ef\u4ee5\u5e2e\u52a9\u4f60\u66f4\u5bb9\u6613\u5730\u8bfb\u53d6\u5d4c\u5957\u7684\u72b6\u6001\u5c5e\u6027\u3002<\/p>\n<\/p>\n<p><h3>\u56db\u3001\u9ad8\u7ea7\u7528\u4f8b\u548c\u4f18\u5316<\/h3>\n<\/p>\n<p><p><strong>\u9519\u8bef\u5904\u7406<\/strong>:<\/p>\n<p>\u4e3a\u4e86\u63d0\u9ad8\u51fd\u6570\u7684\u5065\u58ee\u6027\uff0c\u53ef\u4ee5\u6dfb\u52a0\u9519\u8bef\u5904\u7406\u673a\u5236\u3002\u6bd4\u5982\uff0c\u5982\u679c\u8def\u5f84\u662f\u975e\u6cd5\u7684\u5b57\u7b26\u4e32\uff0c\u51fd\u6570\u53ef\u4ee5\u629b\u51fa\u4e00\u4e2a\u9519\u8bef\u6216\u8005\u8fd4\u56de\u7279\u6b8a\u7684\u503c\u6765\u8fdb\u884c\u63d0\u9192\u3002<\/p>\n<\/p>\n<p><p><strong>\u7f13\u5b58\u673a\u5236<\/strong>:<\/p>\n<p>\u5982\u679c\u51fd\u6570\u5c06\u88ab\u9891\u7e41\u8c03\u7528\uff0c\u9488\u5bf9\u76f8\u540c\u7684\u8def\u5f84\u4e0e\u5bf9\u8c61\uff0c\u53ef\u4ee5\u8003\u8651\u5b9e\u73b0\u4e00\u4e2a\u7f13\u5b58\u673a\u5236\u3002\u8fd9\u6837\uff0c\u4e4b\u524d\u5df2\u7ecf\u89e3\u6790\u8fc7\u7684\u8def\u5f84\u53ef\u4ee5\u7f13\u5b58\u8d77\u6765\uff0c\u907f\u514d\u91cd\u590d\u7684\u8ba1\u7b97\u3002<\/p>\n<\/p>\n<p><p>\u4f7f\u7528 GETPROPBYPATH \u51fd\u6570\u53ef\u4ee5\u5927\u5927\u52a0\u5f3a\u4f60\u7684\u524d\u7aef\u4ee3\u7801\u7684\u5b89\u5168\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u901a\u8fc7\u7b80\u5355\u7684\u8def\u5f84\u5b57\u7b26\u4e32\uff0c\u4f60\u80fd\u5b89\u5168\u5730\u8bbf\u95ee\u6df1\u5c42\u5d4c\u5957\u7684\u5bf9\u8c61\u5c5e\u6027\uff0c\u800c\u65e0\u9700\u62c5\u5fc3\u4e2d\u9014\u906d\u9047<code>undefined<\/code>\u5c5e\u6027\u5f15\u8d77\u7684\u4e2d\u65ad\u3002\u8bb0\u4f4f\u9002\u65f6\u8fdb\u884c\u51fd\u6570\u4f18\u5316\uff0c\u4ee5\u9002\u5e94\u4e0d\u540c\u7684\u9879\u76ee\u9700\u8981\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>1.<\/strong> \u5982\u4f55\u5728\u524d\u7aefjQuery\u9879\u76ee\u4e2d\u4f7f\u7528getPropByPath\u51fd\u6570\uff1f<br \/>\n\u83b7\u53d6\u5bf9\u8c61\u7684\u5d4c\u5957\u5c5e\u6027\u53ef\u80fd\u662f\u5728\u524d\u7aef\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u5e38\u89c1\u7684\u9700\u6c42\u4e4b\u4e00\u3002\u4e3a\u4e86\u5728jQuery\u9879\u76ee\u4e2d\u4f7f\u7528getPropByPath\u51fd\u6570\uff0c\u4f60\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u8fdb\u884c\u64cd\u4f5c\uff1a<\/p>\n<ul>\n<li>\u4e0b\u8f7dgetPropByPath\u51fd\u6570\u7684\u76f8\u5173\u4ee3\u7801\uff0c\u5e76\u5f15\u5165\u5230\u4f60\u7684\u9879\u76ee\u4e2d\u3002<\/li>\n<li>\u9996\u5148\uff0c\u786e\u4fdd\u4f60\u6709\u4e00\u4e2a\u5bf9\u8c61\uff0c\u8be5\u5bf9\u8c61\u5305\u542b\u4e86\u4f60\u60f3\u8981\u83b7\u53d6\u5c5e\u6027\u7684\u5d4c\u5957\u8def\u5f84\u3002<\/li>\n<li>\u7136\u540e\uff0c\u8c03\u7528getPropByPath\u51fd\u6570\uff0c\u5c06\u8be5\u5bf9\u8c61\u4f5c\u4e3a\u7b2c\u4e00\u4e2a\u53c2\u6570\u4f20\u5165\uff0c\u5e76\u5c06\u5c5e\u6027\u7684\u5d4c\u5957\u8def\u5f84\u4f5c\u4e3a\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4f20\u5165\u3002<\/li>\n<li>\u6700\u540e\uff0c\u51fd\u6570\u5c06\u8fd4\u56de\u4f60\u60f3\u8981\u83b7\u53d6\u7684\u5c5e\u6027\u503c\u3002<\/li>\n<\/ul>\n<p><strong>2.<\/strong> getPropByPath\u51fd\u6570\u5728\u524d\u7aefjQuery\u9879\u76ee\u4e2d\u7684\u5b9e\u9645\u5e94\u7528\u573a\u666f\u662f\u4ec0\u4e48\uff1f<br \/>\n\u5728\u524d\u7aefjQuery\u9879\u76ee\u4e2d\uff0cgetPropByPath\u51fd\u6570\u53ef\u4ee5\u5e2e\u52a9\u4f60\u8f7b\u677e\u5730\u83b7\u53d6\u5bf9\u8c61\u7684\u5d4c\u5957\u5c5e\u6027\u3002\u8fd9\u5728\u4ee5\u4e0b\u60c5\u51b5\u4e0b\u7279\u522b\u6709\u7528\uff1a<\/p>\n<ul>\n<li>\u5f53\u4f60\u901a\u8fc7JSON\u6570\u636e\u6216API\u54cd\u5e94\u83b7\u53d6\u5230\u4e00\u4e2a\u5d4c\u5957\u7684\u5bf9\u8c61\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528getPropByPath\u51fd\u6570\u83b7\u53d6\u60f3\u8981\u7684\u5c5e\u6027\u503c\u3002<\/li>\n<li>\u5728\u5904\u7406\u8868\u5355\u6570\u636e\u65f6\uff0c\u4f60\u53ef\u80fd\u9700\u8981\u83b7\u53d6\u5230\u8868\u5355\u5b57\u6bb5\u7684\u503c\uff0c\u800c\u8fd9\u4e9b\u5b57\u6bb5\u5f80\u5f80\u4ee5\u5bf9\u8c61\u7684\u5f62\u5f0f\u5b58\u5728\u3002<\/li>\n<li>\u5f53\u4f60\u9700\u8981\u5728\u9875\u9762\u4e0a\u5c55\u793a\u7279\u5b9a\u5c5e\u6027\u7684\u503c\uff0c\u5e76\u4e14\u8be5\u5c5e\u6027\u53ef\u80fd\u4f4d\u4e8e\u4e00\u4e2a\u590d\u6742\u7684\u5bf9\u8c61\u7ed3\u6784\u4e2d\u65f6\uff0cgetPropByPath\u51fd\u6570\u53ef\u4ee5\u63d0\u4f9b\u4fbf\u5229\u3002<\/li>\n<\/ul>\n<p><strong>3.<\/strong> \u6709\u6ca1\u6709\u5176\u4ed6\u66ff\u4ee3\u65b9\u6cd5\u6765\u83b7\u53d6\u5bf9\u8c61\u7684\u5d4c\u5957\u5c5e\u6027\uff0c\u800c\u4e0d\u4f7f\u7528getPropByPath\u51fd\u6570\uff1f<br \/>\n\u9664\u4e86\u4f7f\u7528getPropByPath\u51fd\u6570\u4e4b\u5916\uff0c\u8fd8\u6709\u5176\u4ed6\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u5bf9\u8c61\u7684\u5d4c\u5957\u5c5e\u6027\uff0c\u6bd4\u5982\u4f7f\u7528\u70b9\u53f7\uff08.\uff09\u6216\u65b9\u62ec\u53f7\uff08[]\uff09\u6765\u8bbf\u95ee\u5c5e\u6027\u3002\u4e00\u4e9b\u5e38\u7528\u7684\u66ff\u4ee3\u65b9\u6cd5\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u70b9\u53f7\u6765\u8bbf\u95ee\u5c5e\u6027\uff1a\u8981\u83b7\u53d6\u5bf9\u8c61\u7684\u5d4c\u5957\u5c5e\u6027\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u70b9\u53f7\uff08.\uff09\u6765\u8bbf\u95ee\uff0c\u4f8b\u5982obj.nestedProperty.subProperty\u3002<\/li>\n<li>\u4f7f\u7528\u65b9\u62ec\u53f7\u6765\u8bbf\u95ee\u5c5e\u6027\uff1a\u4f60\u4e5f\u53ef\u4ee5\u4f7f\u7528\u65b9\u62ec\u53f7\uff08[]\uff09\u6765\u8bbf\u95ee\u5d4c\u5957\u5c5e\u6027\uff0c\u4f8b\u5982obj[&#039;nestedProperty&#039;][&#039;subProperty&#039;]\u3002<\/li>\n<li>\u4f7f\u7528lodash\u6216underscore\u7b49\u5de5\u5177\u5e93\uff1a\u8fd9\u4e9b\u5de5\u5177\u5e93\u63d0\u4f9b\u4e86\u66f4\u591a\u7075\u6d3b\u7684\u65b9\u6cd5\u6765\u83b7\u53d6\u5bf9\u8c61\u7684\u5d4c\u5957\u5c5e\u6027\uff0c\u4f8b\u5982\u4f7f\u7528lodash\u7684get\u51fd\u6570\uff1a_.get(obj, &#039;nestedProperty.subProperty&#039;)\u3002<\/li>\n<\/ul>\n<p>\u8bf7\u6ce8\u610f\uff0c\u9009\u62e9\u4f7f\u7528\u54ea\u79cd\u65b9\u6cd5\u53d6\u51b3\u4e8e\u4f60\u7684\u9879\u76ee\u9700\u6c42\u548c\u4e2a\u4eba\u504f\u597d\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"GETPROPBYPATH \u51fd\u6570\u662f\u4e00\u4e2a\u5b9e\u7528\u7684\u5de5\u5177\u51fd\u6570\uff0c\u5b83\u53ef\u4ee5\u5e2e\u52a9\u4f60\u5728\u524d\u7aef jQuery \u9879\u76ee\u4e2d\u4fbf\u6377\u5730\u83b7\u53d6\u5bf9\u8c61\u7684 [&hellip;]","protected":false},"author":3,"featured_media":306238,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/306222"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=306222"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/306222\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/306238"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=306222"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=306222"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=306222"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}