{"id":170227,"date":"2024-05-08T17:02:59","date_gmt":"2024-05-08T09:02:59","guid":{"rendered":""},"modified":"2024-05-08T17:03:06","modified_gmt":"2024-05-08T09:03:06","slug":"javascript-%e7%a8%8b%e5%ba%8f%e4%b8%ad%e6%80%8e%e4%b9%88%e6%93%8d%e4%bd%9c-float-%e5%b1%9e%e6%80%a7","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/170227.html","title":{"rendered":"JavaScript \u7a0b\u5e8f\u4e2d\u600e\u4e48\u64cd\u4f5c float \u5c5e\u6027"},"content":{"rendered":"

\"JavaScript<\/p>\n

\u64cd\u4f5c JavaScript \u4e2d\u7684 float \u5c5e\u6027\u6d89\u53ca\u5230\u4f7f\u7528 CSS \u64cd\u4f5c\u548c JavaScript \u5bf9\u8c61\u5c5e\u6027\u7684\u4fee\u6539\u3002\u6838\u5fc3\u624b\u6bb5\u5305\u62ec\u76f4\u63a5\u901a\u8fc7 JavaScript \u4fee\u6539\u5143\u7d20\u7684 style \u5c5e\u6027\u3001\u4f7f\u7528CSS\u7c7b\u522b\u5207\u6362<\/strong>\u3001\u4ee5\u53ca\u5229\u7528\u73b0\u4ee3\u524d\u7aef\u6846\u67b6\u8fdb\u884c\u52a8\u6001\u7ed1\u5b9a\u3002\u5728\u8fd9\u4e9b\u65b9\u6cd5\u4e2d\uff0c\u76f4\u63a5\u4fee\u6539\u5143\u7d20\u7684 style \u5c5e\u6027<\/strong>\u662f\u6700\u76f4\u63a5\u3001\u6700\u57fa\u672c\u7684\u65b9\u5f0f\u3002\u901a\u8fc7\u9009\u53d6\u4e00\u4e2a\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u5176 style \u5c5e\u6027\u6765\u66f4\u6539 CSS \u7684 float \u503c\uff0c\u4ece\u800c\u6539\u53d8\u5143\u7d20\u5728\u9875\u9762\u4e2d\u7684\u6d41\u52a8\u65b9\u5f0f\u3002\u6bd4\u5982\uff0c\u901a\u8fc7 document.getElementById \u6216\u8005\u5176\u4ed6 DOM \u9009\u62e9\u65b9\u6cd5\u83b7\u53d6\u5230\u4e00\u4e2a\u5143\u7d20\u540e\uff0c\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7\u5176 style.float \u5c5e\u6027\u6765\u8bbe\u7f6e\u6d6e\u52a8\uff0c\u8fd9\u5bf9\u4e8e\u5feb\u901f\u6d4b\u8bd5\u6216\u52a8\u6001\u8c03\u6574\u5143\u7d20\u5e03\u5c40\u975e\u5e38\u65b9\u4fbf\u3002<\/p>\n<\/p>\n

\n

\u4e00\u3001\u76f4\u63a5\u4fee\u6539\u5143\u7d20\u7684 STYLE \u5c5e\u6027<\/h3>\n<\/p>\n

\u5728 JavaScript \u4e2d\uff0c\u64cd\u4f5c\u5143\u7d20\u7684 style \u5c5e\u6027\u662f\u5f71\u54cd\u9875\u9762\u5143\u7d20\u6837\u5f0f\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u4e4b\u4e00\u3002\u901a\u8fc7\u83b7\u53d6\u5230\u9875\u9762\u4e0a\u7684\u5143\u7d20\u540e\uff0c\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539\u5176 style \u5c5e\u6027\u4e2d\u7684 float \u5c5e\u6027\u6765\u63a7\u5236\u8be5\u5143\u7d20\u7684\u6d6e\u52a8\u6548\u679c\u3002\u6d6e\u52a8\u6548\u679c\u53ef\u4ee5\u4f7f\u5143\u7d20\u5de6\u6d6e\u52a8\u6216\u53f3\u6d6e\u52a8\uff0c\u4ece\u800c\u5f71\u54cd\u7f51\u9875\u5e03\u5c40\u3002<\/p>\n<\/p>\n

\u83b7\u53d6\u9875\u9762\u5143\u7d20<\/h4>\n<\/p>\n

\u9996\u5148\uff0c\u9700\u8981\u4f7f\u7528 JavaScript \u63d0\u4f9b\u7684\u65b9\u6cd5\uff0c\u5982 document.getElementById<\/code> \u6216 document.querySelector<\/code>\uff0c\u6765\u83b7\u53d6\u9875\u9762\u4e0a\u7684\u5143\u7d20\u3002\u83b7\u53d6\u5230\u5143\u7d20\u4e4b\u540e\uff0c\u5c31\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u5e76\u4fee\u6539\u5176\u6837\u5f0f\u4e86\u3002<\/p>\n<\/p>\n

var element = document.getElementById("myElement");<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4fee\u6539 float \u5c5e\u6027<\/h4>\n<\/p>\n
\u83b7\u53d6\u5230\u5143\u7d20\u4e4b\u540e\uff0c\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7\u4fee\u6539\u5176 style.float<\/code> \u5c5e\u6027\u6765\u63a7\u5236\u5176\u6d6e\u52a8\u65b9\u5411\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u5728 JavaScript \u4e2d\u64cd\u4f5c\u6837\u5f0f\u65f6\uff0c\u5e94\u4f7f\u7528 cssFloat<\/code> \u6765\u4ee3\u66ff CSS \u4e2d\u7684 float<\/code> \u5c5e\u6027\u3002<\/p>\n<\/p>\n
element.style.cssFloat = "right";<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528 CSS \u7c7b\u522b\u5207\u6362<\/h3>\n<\/p>\n
\u53e6\u4e00\u79cd\u65b9\u6cd5\u662f\u9884\u5b9a\u4e49 CSS \u7c7b\u522b\uff0c\u5176\u4e2d\u5305\u542b\u4e0d\u540c\u7684 float \u5c5e\u6027\u503c\u3002\u7136\u540e\uff0c\u901a\u8fc7 JavaScript \u52a8\u6001\u5730\u4e3a\u9875\u9762\u5143\u7d20\u6dfb\u52a0\u6216\u79fb\u9664\u8fd9\u4e9b\u7c7b\u522b\uff0c\u4ece\u800c\u5b9e\u73b0\u5bf9\u5143\u7d20 float \u5c5e\u6027\u7684\u63a7\u5236\u3002\u8fd9\u79cd\u65b9\u5f0f\u7684\u4f18\u70b9\u662f\uff0c\u6837\u5f0f\u4e0e\u811a\u672c\u89e3\u8026\uff0c\u4fbf\u4e8e\u7ba1\u7406\u548c\u7ef4\u62a4\u3002<\/p>\n<\/p>\n
\u9884\u5b9a\u4e49 CSS \u7c7b\u522b<\/h4>\n<\/p>\n
\u9996\u5148\uff0c\u5728\u6837\u5f0f\u8868\u4e2d\u5b9a\u4e49\u4e0d\u540c\u7684\u7c7b\u522b\u4ee5\u4ee3\u8868\u4e0d\u540c\u7684\u6d6e\u52a8\u65b9\u5411\u3002<\/p>\n<\/p>\n
.float-left {<\/p>\n
    float: left;<\/p>\n
}<\/p>\n
.float-right {<\/p>\n
    float: right;<\/p>\n
}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u52a8\u6001\u5207\u6362\u7c7b\u522b<\/h4>\n<\/p>\n
\u7136\u540e\uff0c\u4f7f\u7528 JavaScript \u7684 classList<\/code> \u5c5e\u6027\u6765\u4e3a\u5143\u7d20\u52a8\u6001\u6dfb\u52a0\u6216\u79fb\u9664\u4e0a\u8ff0\u5b9a\u4e49\u7684\u7c7b\u522b\uff0c\u4ece\u800c\u6539\u53d8\u5143\u7d20\u7684\u6d6e\u52a8\u65b9\u5411\u3002<\/p>\n<\/p>\n
var element = document.getElementById("myElement");<\/p>\n
\/\/ \u6dfb\u52a0\u6d6e\u52a8\u5230\u53f3\u8fb9\u7684\u7c7b<\/p>\n
element.classList.add("float-right");<\/p>\n
\/\/ \u79fb\u9664\u6d6e\u52a8\u5230\u53f3\u8fb9\u7684\u7c7b<\/p>\n
element.classList.remove("float-right");<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4e09\u3001\u5229\u7528\u73b0\u4ee3\u524d\u7aef\u6846\u67b6\u8fdb\u884c\u52a8\u6001\u7ed1\u5b9a<\/h3>\n<\/p>\n
\u5728\u4f7f\u7528 Angular\u3001React\u3001Vue \u7b49\u73b0\u4ee3\u524d\u7aef\u6846\u67b6\u65f6\uff0c\u53ef\u4ee5\u5229\u7528\u8fd9\u4e9b\u6846\u67b6\u63d0\u4f9b\u7684\u7ed1\u5b9a\u673a\u5236\uff0c\u6765\u66f4\u52a0\u7075\u6d3b\u5730\u64cd\u4f5c\u5143\u7d20\u7684 float \u5c5e\u6027\u3002\u8fd9\u4e9b\u6846\u67b6\u901a\u5e38\u63d0\u4f9b\u4e86\u58f0\u660e\u5f0f\u7684\u7ed1\u5b9a\u8bed\u6cd5\uff0c\u5141\u8bb8\u5f00\u53d1\u8005\u901a\u8fc7\u66f4\u6539\u6570\u636e\u6a21\u578b\u6765\u81ea\u52a8\u66f4\u65b0\u89c6\u56fe\u4e2d\u5143\u7d20\u7684\u6837\u5f0f\uff0c\u5305\u62ec\u5176 float \u5c5e\u6027\u3002<\/p>\n<\/p>\n
\u4f7f\u7528 Angular<\/h4>\n<\/p>\n
\u5728 Angular \u4e2d\uff0c\u53ef\u4ee5\u5229\u7528 [style.float]<\/code> \u7ed1\u5b9a\u6765\u52a8\u6001\u8bbe\u7f6e\u5143\u7d20\u7684 float \u65b9\u5411\u3002<\/p>\n<\/p>\n
<div [style.float]="isRightFloat ? 'right' : 'left'">\u8fd9\u91cc\u662f\u5185\u5bb9<\/div><\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f7f\u7528 React<\/h4>\n<\/p>\n
\u5728 React \u4e2d\uff0c\u53ef\u4ee5\u5728\u6e32\u67d3\u5143\u7d20\u65f6\uff0c\u6839\u636e\u72b6\u6001\u52a8\u6001\u8bbe\u7f6e\u5176\u6837\u5f0f\u5bf9\u8c61\u7684 float<\/code> \u5c5e\u6027\u3002<\/p>\n<\/p>\n
const floatStyle = {<\/p>\n
  float: isRightFloat ? 'right' : 'left',<\/p>\n
};<\/p>\n
<div style={floatStyle}>\u8fd9\u91cc\u662f\u5185\u5bb9<\/div><\/p>\n
<\/code><\/pre>\n<\/p>\n
\u56db\u3001\u603b\u7ed3<\/h3>\n<\/p>\n
\u64cd\u4f5c JavaScript \u4e2d\u7684 float \u5c5e\u6027\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u5b9e\u73b0\uff0c\u5305\u62ec\u76f4\u63a5\u901a\u8fc7 JavaScript \u4fee\u6539\u5143\u7d20\u7684 style \u5c5e\u6027\u3001\u4f7f\u7528CSS\u7c7b\u522b\u5207\u6362\uff0c\u4ee5\u53ca\u5229\u7528\u73b0\u4ee3\u524d\u7aef\u6846\u67b6\u8fdb\u884c\u52a8\u6001\u7ed1\u5b9a\u3002\u9009\u62e9\u54ea\u79cd\u65b9\u6cd5\u53d6\u51b3\u4e8e\u5177\u4f53\u9700\u6c42\u3001\u9879\u76ee\u7ed3\u6784\u4ee5\u53ca\u4e2a\u4eba\u559c\u597d\uff0c\u4f46\u638c\u63e1\u8fd9\u4e9b\u65b9\u6cd5\u5c06\u5927\u5927\u589e\u52a0\u524d\u7aef\u5f00\u53d1\u7684\u7075\u6d3b\u6027\u548c\u6548\u7387\u3002\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\uff0c\u5efa\u8bae\u4f18\u5148\u8003\u8651\u4f7f\u7528\u7c7b\u522b\u5207\u6362\u548c\u6846\u67b6\u7ed1\u5b9a\u8fd9\u4e24\u79cd\u65b9\u5f0f\uff0c\u56e0\u4e3a\u5b83\u4eec\u5728\u7ef4\u62a4\u548c\u53ef\u8bfb\u6027\u65b9\u9762\u5177\u6709\u4f18\u52bf\u3002<\/p>\n<\/p>\n
\u5bf9\u4e8e\u5236\u4f5c\u54cd\u5e94\u5f0f\u8bbe\u8ba1\u3001\u9ad8\u5ea6\u52a8\u6001\u7684\u754c\u9762\u800c\u8a00\uff0c\u7406\u89e3\u548c\u638c\u63e1\u5982\u4f55\u5728 JavaScript \u4e2d\u64cd\u4f5c float \u5c5e\u6027\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u65e0\u8bba\u662f\u901a\u8fc7\u7eaf JavaScript \u4ee3\u7801\u8fd8\u662f\u501f\u52a9\u6846\u67b6\u7684\u529b\u91cf\uff0c\u8c03\u6574\u548c\u63a7\u5236\u5143\u7d20\u7684\u5e03\u5c40\u4f1a\u4f7f\u9875\u9762\u66f4\u52a0\u4e92\u52a8\u548c\u7528\u6237\u53cb\u597d\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u5982\u4f55\u4f7f\u7528 JavaScript \u64cd\u4f5c float \u5c5e\u6027\u5e76\u8bbe\u7f6e\u5176\u503c\uff1f<\/strong><\/p>\n
\u5728 JavaScript \u4e2d\uff0c\u64cd\u4f5c float \u5c5e\u6027\u53ef\u4ee5\u901a\u8fc7\u8bbf\u95ee\u548c\u4fee\u6539\u5143\u7d20\u7684 style \u5c5e\u6027\u6765\u5b9e\u73b0\u3002\u8981\u8bbe\u7f6e float \u5c5e\u6027\u7684\u503c\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u5143\u7d20\u7684 style.float \u5c5e\u6027\uff0c\u5e76\u5c06\u5176\u8bbe\u7f6e\u4e3a\u6240\u9700\u7684\u503c\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u60f3\u5c06\u4e00\u4e2a\u5143\u7d20\u7684 float \u5c5e\u6027\u8bbe\u7f6e\u4e3a left\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
var element = document.getElementById("myElement");\nelement.style.float = "left";\n<\/code><\/pre>\n
\u8fd9\u5c06\u4f7f\u5f97\u5143\u7d20\u5411\u5de6\u6d6e\u52a8\u3002\u540c\u6837\uff0c\u4f60\u4e5f\u53ef\u4ee5\u5c06\u5176\u8bbe\u7f6e\u4e3a right \u6765\u5b9e\u73b0\u5411\u53f3\u6d6e\u52a8\u3002<\/p>\n
2. \u5982\u4f55\u52a8\u6001\u66f4\u6539\u5143\u7d20\u7684 float \u5c5e\u6027\u503c\uff1f<\/strong><\/p>\n
\u5982\u679c\u4f60\u5e0c\u671b\u6839\u636e\u7279\u5b9a\u7684\u6761\u4ef6\u52a8\u6001\u66f4\u6539\u5143\u7d20\u7684 float \u5c5e\u6027\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528 JavaScript \u6765\u5b9e\u73b0\u3002\u9996\u5148\uff0c\u4f60\u9700\u8981\u83b7\u53d6\u5230\u8981\u66f4\u6539\u7684\u5143\u7d20\u7684\u5f15\u7528\uff0c\u7136\u540e\u6839\u636e\u6761\u4ef6\u8bbe\u7f6e\u65b0\u7684 float \u503c\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u60f3\u5728\u70b9\u51fb\u4e00\u4e2a\u6309\u94ae\u65f6\u5c06\u5143\u7d20\u7684 float \u5c5e\u6027\u8bbe\u7f6e\u4e3a right\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n
var button = document.getElementById("myButton");\nvar element = document.getElementById("myElement");\n\nbutton.onclick = function() {\n  element.style.float = "right";\n};\n<\/code><\/pre>\n
\u5f53\u6309\u94ae\u88ab\u70b9\u51fb\u65f6\uff0c\u5143\u7d20\u7684 float \u5c5e\u6027\u5c06\u88ab\u8bbe\u7f6e\u4e3a right\u3002<\/p>\n
3. \u6211\u53ef\u4ee5\u4f7f\u7528 JavaScript \u68c0\u67e5\u5143\u7d20\u7684 float \u5c5e\u6027\u503c\u5417\uff1f<\/strong><\/p>\n
\u662f\u7684\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 JavaScript \u6765\u68c0\u67e5\u5143\u7d20\u7684 float \u5c5e\u6027\u503c\u3002\u8981\u83b7\u53d6\u5143\u7d20\u7684 float \u5c5e\u6027\u503c\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u5143\u7d20\u7684 style.float \u5c5e\u6027\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
var element = document.getElementById("myElement");\nvar floatPropertyValue = element.style.float;\n\nconsole.log("\u5143\u7d20\u7684 float \u5c5e\u6027\u503c\u4e3a\uff1a" + floatPropertyValue);\n<\/code><\/pre>\n
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