{"id":2857,"date":"2020-04-18T11:10:03","date_gmt":"2020-04-18T03:10:03","guid":{"rendered":"http:\/\/www.yuguoxy.com\/geekhome\/?p=2857"},"modified":"2026-08-18T12:35:29","modified_gmt":"2026-08-18T04:35:29","slug":"js%e4%b8%ad%e7%9a%84%e4%ba%8b%e4%bb%b6%e5%a7%94%e6%89%98%e6%88%96%e4%ba%8b%e4%bb%b6%e4%bb%a3%e7%90%86%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=2857","title":{"rendered":"js\u4e2d\u7684\u4e8b\u4ef6\u59d4\u6258\u6216\u4e8b\u4ef6\u4ee3\u7406\u8be6\u89e3"},"content":{"rendered":"
\n

\u4e8b\u4ef6\u59d4\u6258\u4e5f\u53eb\u4e8b\u4ef6\u4ee3\u7406<\/strong>\u3002\u300aJavaScript \u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u300b\u7684\u8bf4\u6cd5\u662f\uff1a\u5229\u7528\u4e8b\u4ef6\u5192\u6ce1\uff0c\u53ea\u6307\u5b9a\u4e00\u4e2a\u5904\u7406\u7a0b\u5e8f\uff0c\u5c31\u80fd\u7ba1\u7406\u67d0\u4e00\u7c7b\u578b\u7684\u6240\u6709\u4e8b\u4ef6\u3002\u7f51\u4e0a\u5e38\u7528\u201c\u4ee3\u6536\u5feb\u9012\u201d\u6765\u8bb2\uff0c\u8fd9\u4e2a\u6bd4\u65b9\u786e\u5b9e\u8d34\u5207\u3002<\/p>\n

\n

\u6709\u4e09\u4e2a\u540c\u4e8b\u5468\u4e00\u4f1a\u6536\u5230\u5feb\u9012\u3002\u7b7e\u6536\u6709\u4e24\u79cd\u529e\u6cd5\uff1a\u4e09\u4eba\u7ad9\u95e8\u53e3\u7b49\uff0c\u6216\u59d4\u6258\u524d\u53f0\u4ee3\u7b7e\u3002\u516c\u53f8\u4e0d\u4f1a\u5bb9\u5fcd\u4e00\u5806\u4eba\u5835\u95e8\u53e3\uff0c\u6240\u4ee5\u901a\u5e38\u9009\u59d4\u6258\u3002\u524d\u53f0\u5224\u65ad\u6536\u4ef6\u4eba\u3001\u6309\u8981\u6c42\u7b7e\u6536\u751a\u81f3\u4ee3\u4ed8\u6b3e\u3002\u65b0\u5458\u5de5\u6765\u4e86\uff0c\u5bc4\u7ed9\u4ed6\u7684\u4ef6\u524d\u53f0\u7167\u6837\u80fd\u6838\u5b9e\u4ee3\u7b7e\u3002<\/p>\n<\/blockquote>\n

\u8fd9\u91cc\u5176\u5b9e\u6709\u4e24\u5c42\u610f\u601d\uff1a\u73b0\u6709 DOM \u8282\u70b9\u6709\u4e8b\u4ef6\uff1b\u540e\u6765\u65b0\u52a0\u7684 DOM \u8282\u70b9\u4e5f\u6709\u4e8b\u4ef6\u3002<\/p>\n\n\n\n\n\n\n
\u505a\u6cd5<\/th>\nDOM \u4ea4\u4e92<\/th>\n\u65b0\u589e\u8282\u70b9<\/th>\n<\/tr>\n<\/thead>\n
\u7ed9\u6bcf\u4e2a li \u7ed1 click<\/td>\n\u904d\u5386 + \u6bcf\u6b21\u70b9\u51fb\u518d\u5b9a\u4f4d<\/td>\n\u8981\u518d\u7ed1\u4e00\u6b21\uff0c\u5426\u5219\u6ca1\u4e8b\u4ef6<\/td>\n<\/tr>\n
\u7236\u7ea7\u59d4\u6258 + target \u5224\u65ad<\/td>\n\u53ea\u4ea4\u4e92\u4e00\u6b21<\/td>\n\u5929\u7136\u8986\u76d6\u65b0\u8282\u70b9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u4e00\u3001\u4e3a\u4ec0\u4e48\u8981\u7528\u4e8b\u4ef6\u59d4\u6258<\/h2>\n

\u5c11\u91cf\u8282\u70b9\u76f4\u63a5\u7ed1\u4e8b\u4ef6\u6ca1\u95ee\u9898\u3002\u4e00\u767e\u4e2a li \u90fd\u8981\u540c\u6837\u7684 click\uff0c\u7528 for \u5faa\u73af\u9010\u4e2a\u6dfb\u52a0\uff0c\u4f1a\u6709\u6027\u80fd\u95ee\u9898\uff1a\u9875\u9762\u4e0a\u7684\u5904\u7406\u7a0b\u5e8f\u6570\u91cf\u76f4\u63a5\u5f71\u54cd\u6574\u4f53\u6027\u80fd\uff0c\u8bbf\u95ee DOM \u8d8a\u591a\uff0c\u91cd\u7ed8\u91cd\u6392\u8d8a\u591a\uff0c\u4ea4\u4e92\u5c31\u7eea\u8d8a\u6162\u3002\u6027\u80fd\u4f18\u5316\u7684\u4e00\u6761\u4e3b\u601d\u8def\u5c31\u662f\u51cf\u5c11 DOM \u64cd\u4f5c\u3002<\/p>\n

\u59d4\u6258\u628a\u5224\u65ad\u653e\u5230 JS \u91cc\uff0c\u548c DOM \u53ea\u4ea4\u4e92\u4e00\u6b21\uff0c\u4ea4\u4e92\u6b21\u6570\u5927\u5e45\u4e0b\u964d\u3002<\/p>\n

\u4e8c\u3001\u5b9e\u73b0\u539f\u7406\uff1a\u5192\u6ce1<\/h2>\n

\u4e8b\u4ef6\u4ece\u6700\u6df1\u8282\u70b9\u5f80\u4e0a\u4f20\u64ad\u3002\u4f8b\u5982 div > ul > li > a<\/code>\uff0c\u7ed9\u6700\u91cc\u9762\u7684 a \u52a0 click\uff0c\u6267\u884c\u987a\u5e8f\u662f a \u2192 li \u2192 ul \u2192 div\u3002\u56e0\u6b64\u7ed9\u6700\u5916\u5c42 div \u52a0\u70b9\u51fb\uff0c\u91cc\u9762\u7684 ul\u3001li\u3001a \u70b9\u51fb\u90fd\u4f1a\u5192\u6ce1\u4e0a\u6765\uff0c\u8fd9\u5c31\u662f\u59d4\u6258\uff1a\u7236\u7ea7\u4ee3\u6267\u884c\u3002<\/p>\n

\"\u4e8b\u4ef6\u59d4\u62581\"<\/a><\/p>\n

\u4e09\u3001\u57fa\u672c\u64cd\u4f5c\uff1a\u540c\u6837\u6548\u679c\u7684\u5b50\u8282\u70b9<\/h2>\n

\u5148\u770b\u4e00\u822c\u5199\u6cd5\u3002HTML\uff1a<\/p>\n

<ul id=\"ul1\">\n    <li>111<\/li>\n    <li>222<\/li>\n    <li>333<\/li>\n    <li>444<\/li>\n<\/ul><\/code><\/pre>\n
\u70b9\u51fb li \u5f39\u51fa 123\uff1a<\/p>\n
window.onload = function(){\n    var oUl = document.getElementById(\"ul1\");\n    var aLi = oUl.getElementsByTagName('li');\n    for(var i=0;i<aLi.length;i++){\n        aLi[i].onclick = function(){\n            alert(123);\n        }\n    }\n}<\/code><\/pre>\n
DOM \u64cd\u4f5c\u4e0d\u5c11\uff1a\u5148\u627e ul\uff0c\u518d\u904d\u5386 li\uff0c\u6bcf\u6b21\u70b9\u51fb\u8fd8\u8981\u518d\u5b9a\u4f4d\u76ee\u6807 li\u3002\u6539\u6210\u59d4\u6258\uff1a<\/p>\n
window.onload = function(){\n    var oUl = document.getElementById(\"ul1\");\n    oUl.onclick = function(){\n        alert(123);\n    }\n}<\/code><\/pre>\n
li \u88ab\u70b9\u65f6\u5192\u6ce1\u5230 ul\uff0cul \u4e0a\u6709 click \u5c31\u4f1a\u89e6\u53d1\u3002\u4f46\u70b9 ul \u7a7a\u767d\u5904\u4e5f\u4f1a\u89e6\u53d1\u3002\u82e5\u53ea\u8981\u70b9 li \u624d\u54cd\u5e94\uff0c\u7528\u4e8b\u4ef6\u6e90\uff1atarget<\/code>\uff08\u6807\u51c6\uff09\u6216 srcElement<\/code>\uff08IE\uff09\uff0c\u518d\u7528 nodeName<\/code> \u5224\u65ad\u6807\u7b7e\uff08\u8fd4\u56de\u5927\u5199\uff0c\u4e60\u60ef\u4e0a\u8f6c\u5c0f\u5199\u518d\u6bd4\uff09\uff1a<\/p>\n
window.onload = function(){\n\u3000\u3000var oUl = document.getElementById(\"ul1\");\n\u3000\u3000oUl.onclick = function(ev){\n\u3000\u3000\u3000\u3000var ev = ev || window.event;\n\u3000\u3000\u3000\u3000var target = ev.target || ev.srcElement;\n\u3000\u3000\u3000\u3000if(target.nodeName.toLowerCase() == 'li'){\n\u3000 \u3000\u3000\u3000\u3000\u3000\u3000\talert(123);\n\u3000\u3000\u3000\u3000\u3000\u3000\u3000     alert(target.innerHTML);\n\u3000\u3000\u3000\u3000}\n\u3000\u3000}\n}<\/code><\/pre>\n
\u8fd9\u6837\u53ea\u6709\u70b9 li \u624d\u89e6\u53d1\uff0c\u6bcf\u6b21\u53ea\u505a\u4e00\u6b21 DOM \u67e5\u627e\u3002li \u5f88\u591a\u65f6\u6536\u76ca\u5f88\u660e\u663e\u3002<\/p>\n
\u56db\u3001\u6bcf\u4e2a\u5b50\u8282\u70b9\u6548\u679c\u4e0d\u540c<\/h2>\n
\u82e5\u6bcf\u4e2a\u6309\u94ae\u884c\u4e3a\u4e0d\u540c\uff0c\u59d4\u6258\u8fd8\u6709\u7528\u5417\uff1fHTML\uff1a<\/p>\n
<div id=\"box\">\n        <input type=\"button\" id=\"add\" value=\"\u6dfb\u52a0\" \/>\n        <input type=\"button\" id=\"remove\" value=\"\u5220\u9664\" \/>\n        <input type=\"button\" id=\"move\" value=\"\u79fb\u52a8\" \/>\n        <input type=\"button\" id=\"select\" value=\"\u9009\u62e9\" \/>\n    <\/div><\/code><\/pre>\n
window.onload = function(){\n            var Add = document.getElementById(\"add\");\n            var Remove = document.getElementById(\"remove\");\n            var Move = document.getElementById(\"move\");\n            var Select = document.getElementById(\"select\");\n            \n            Add.onclick = function(){\n                alert('\u6dfb\u52a0');\n            };\n            Remove.onclick = function(){\n                alert('\u5220\u9664');\n            };\n            Move.onclick = function(){\n                alert('\u79fb\u52a8');\n            };\n            Select.onclick = function(){\n                alert('\u9009\u62e9');\n            }\n            \n        }<\/code><\/pre>\n
\u56db\u4e2a\u6309\u94ae\u56db\u79cd\u64cd\u4f5c\uff0c\u81f3\u5c11\u56db\u6b21 DOM\u3002\u59d4\u6258\u53ef\u4ee5\u4e00\u6b21\u5b8c\u6210\uff1a<\/p>\n
window.onload = function(){\n            var oBox = document.getElementById(\"box\");\n            oBox.onclick = function (ev) {\n                var ev = ev || window.event;\n                var target = ev.target || ev.srcElement;\n                if(target.nodeName.toLocaleLowerCase() == 'input'){\n                    switch(target.id){\n                        case 'add' :\n                            alert('\u6dfb\u52a0');\n                            break;\n                        case 'remove' :\n                            alert('\u5220\u9664');\n                            break;\n                        case 'move' :\n                            alert('\u79fb\u52a8');\n                            break;\n                        case 'select' :\n                            alert('\u9009\u62e9');\n                            break;\n                    }\n                }\n            }\n            \n        }<\/code><\/pre>\n
\u4e94\u3001\u65b0\u589e\u8282\u70b9\u4e5f\u8981\u6709\u4e8b\u4ef6<\/h2>\n
\u6587\u6863\u52a0\u8f7d\u5b8c\u7684\u8282\u70b9\u597d\u529e\u3002\u65b0\u5458\u5de5\u6765\u4e86\uff0c\u4ed6\u80fd\u6536\u5230\u5feb\u9012\u5417\uff1f\u5148\u770b\u5e38\u89c4\u6dfb\u52a0\uff1a<\/p>\n
<input type=\"button\" name=\"\" id=\"btn\" value=\"\u6dfb\u52a0\" \/>\n    <ul id=\"ul1\">\n        <li>111<\/li>\n        <li>222<\/li>\n        <li>333<\/li>\n        <li>444<\/li>\n    <\/ul><\/code><\/pre>\n
\u79fb\u5165 li \u53d8\u7ea2\u3001\u79fb\u51fa\u53d8\u767d\uff1b\u70b9\u6309\u94ae\u5f80 ul \u91cc\u52a0 li\uff1a<\/p>\n
window.onload = function(){\n            var oBtn = document.getElementById(\"btn\");\n            var oUl = document.getElementById(\"ul1\");\n            var aLi = oUl.getElementsByTagName('li');\n            var num = 4;\n            \n            \/\/\u9f20\u6807\u79fb\u5165\u53d8\u7ea2\uff0c\u79fb\u51fa\u53d8\u767d\n            for(var i=0; i<aLi.length;i++){\n                aLi[i].onmouseover = function(){\n                    this.style.background = 'red';\n                };\n                aLi[i].onmouseout = function(){\n                    this.style.background = '#fff';\n                }\n            }\n            \/\/\u6dfb\u52a0\u65b0\u8282\u70b9\n            oBtn.onclick = function(){\n                num++;\n                var oLi = document.createElement('li');\n                oLi.innerHTML = 111*num;\n                oUl.appendChild(oLi);\n            };\n        }<\/code><\/pre>\n
\u65b0 li \u6ca1\u6709\u4e8b\u4ef6\u3002\u5e38\u89c1\u8865\u6551\u662f\u628a for \u5305\u6210 mHover<\/code>\uff0c\u6dfb\u52a0\u540e\u518d\u8c03\u4e00\u6b21\uff1a<\/p>\n
window.onload = function(){\n            var oBtn = document.getElementById(\"btn\");\n            var oUl = document.getElementById(\"ul1\");\n            var aLi = oUl.getElementsByTagName('li');\n            var num = 4;\n            \n            function mHover () {\n                \/\/\u9f20\u6807\u79fb\u5165\u53d8\u7ea2\uff0c\u79fb\u51fa\u53d8\u767d\n                for(var i=0; i<aLi.length;i++){\n                    aLi[i].onmouseover = function(){\n                        this.style.background = 'red';\n                    };\n                    aLi[i].onmouseout = function(){\n                        this.style.background = '#fff';\n                    }\n                }\n            }\n            mHover ();\n            \/\/\u6dfb\u52a0\u65b0\u8282\u70b9\n            oBtn.onclick = function(){\n                num++;\n                var oLi = document.createElement('li');\n                oLi.innerHTML = 111*num;\n                oUl.appendChild(oLi);\n                mHover ();\n            };\n        }<\/code><\/pre>\n
\u529f\u80fd\u5bf9\u4e86\uff0c\u4f46\u53c8\u591a\u4e00\u8f6e DOM \u904d\u5386\u3002\u59d4\u6258\u7248\uff1a<\/p>\n
window.onload = function(){\n            var oBtn = document.getElementById(\"btn\");\n            var oUl = document.getElementById(\"ul1\");\n            var aLi = oUl.getElementsByTagName('li');\n            var num = 4;\n            \n            \/\/\u4e8b\u4ef6\u59d4\u6258\uff0c\u6dfb\u52a0\u7684\u5b50\u5143\u7d20\u4e5f\u6709\u4e8b\u4ef6\n            oUl.onmouseover = function(ev){\n                var ev = ev || window.event;\n                var target = ev.target || ev.srcElement;\n                if(target.nodeName.toLowerCase() == 'li'){\n                    target.style.background = \"red\";\n                }\n                \n            };\n            oUl.onmouseout = function(ev){\n                var ev = ev || window.event;\n                var target = ev.target || ev.srcElement;\n                if(target.nodeName.toLowerCase() == 'li'){\n                    target.style.background = \"#fff\";\n                }\n                \n            };\n            \n            \/\/\u6dfb\u52a0\u65b0\u8282\u70b9\n            oBtn.onclick = function(){\n                num++;\n                var oLi = document.createElement('li');\n                oLi.innerHTML = 111*num;\n                oUl.appendChild(oLi);\n            };\n        }<\/code><\/pre>\n
\u65b0\u5b50\u5143\u7d20\u81ea\u5e26\u6548\u679c\u3002\u59d4\u6258\u65f6\u4e0d\u5fc5\u904d\u5386\u5b50\u8282\u70b9\uff0c\u53ea\u7ed9\u7236\u7ea7\u7ed1\u4e8b\u4ef6\uff0c\u5176\u4f59\u5728 JS \u91cc\u5b8c\u6210\u3002\u8fd9\u624d\u662f\u7cbe\u9ad3\u3002<\/p>\n
\u516d\u3001\u70b9\u51fb\u843d\u5728 li \u5185\u90e8\u66f4\u6df1\u7684\u8282\u70b9<\/h2>\n
\u573a\u666f\uff1aul > li > div > p<\/code>\uff0cdiv \u5360\u6ee1 li\u3001p \u5360\u6ee1 div\u3002\u7ed9 ul \u7ed1\u4e8b\u4ef6\uff0c\u8981\u5224\u65ad\u70b9\u7684\u662f\u4e0d\u662f li\uff0c\u800c li \u5185\u90e8\u7ed3\u6784\u4e0d\u56fa\u5b9a\u3002e.target<\/code> \u53ef\u80fd\u662f p \u4e5f\u53ef\u80fd\u662f div\u3002\u7ed3\u6784\u793a\u4f8b\uff1a<\/p>\n
\u3000\u3000<ul id=\"test\">\n        <li>\n            <p>11111111111<\/p>\n        <\/li>\n        <li>\n            <div>\n                22222222\n            <\/div>\n        <\/li>\n        <li>\n            <span>3333333333<\/span>\n        <\/li>\n        <li>4444444<\/li>\n    <\/ul><\/code><\/pre>\n
\u4ece target \u5f80\u4e0a\u8d70\u5230 ul\uff0c\u9047\u5230 li \u518d\u5904\u7406\uff1a<\/p>\n
\u3000\u3000var oUl = document.getElementById('test');\n    oUl.addEventListener('click',function(ev){\n        var target = ev.target;\n        while(target !== oUl ){\n            if(target.tagName.toLowerCase() == 'li'){\n                console.log('li click~');\n                break;\n            }\n            target = target.parentNode;\n        }\n    })<\/code><\/pre>\n
while \u5c31\u662f\u6cbf\u5192\u6ce1\u8def\u5f84\u5f80\u5916\u8d70\uff0c\u5f53\u524d target \u662f li \u65f6\u6267\u884c\u903b\u8f91\u5e76\u7ed3\u675f\u5faa\u73af\u3002\u4e5f\u53ef\u4ee5\u62bd\u6210\u9012\u5f52\u3002\u590d\u5236\u5230\u672c\u5730\u5373\u53ef\u770b\u5230\u6548\u679c\u3002<\/p>\n
\u4e03\u3001\u54ea\u4e9b\u4e8b\u4ef6\u9002\u5408\u59d4\u6258<\/h2>\n
\u9002\u5408\uff1aclick<\/code>\u3001mousedown<\/code>\u3001mouseup<\/code>\u3001keydown<\/code>\u3001keyup<\/code>\u3001keypress<\/code>\u3002<\/p>\n
mouseover<\/code> \/ mouseout<\/code> \u867d\u7136\u4f1a\u5192\u6ce1\uff0c\u4f46\u7ecf\u5e38\u8981\u7b97\u4f4d\u7f6e\uff0c\u4e0d\u597d\u5904\u7406\u3002mousemove<\/code> \u6bcf\u6b21\u90fd\u8981\u7b97\u4f4d\u7f6e\uff0c\u66f4\u96be\u63a7\u3002focus<\/code> \/ blur<\/code> \u672c\u8eab\u4e0d\u5192\u6ce1\uff0c\u4e0d\u80fd\u59d4\u6258\u3002<\/p>\n
\u6765\u6e90\uff1ahttps:\/\/www.cnblogs.com\/liugang-vip\/p\/5616484.html<\/p>\n
\n
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