{"id":246,"date":"2022-03-30T11:31:31","date_gmt":"2022-03-30T03:31:31","guid":{"rendered":"https:\/\/www.osvlabs.com\/blog\/?p=246"},"modified":"2022-03-30T11:31:31","modified_gmt":"2022-03-30T03:31:31","slug":"%e5%88%ab%e5%86%8d%e6%bb%9a%e4%ba%86-%e7%8e%b0%e5%9c%a8%e5%b0%b1%e8%a6%81%e8%a7%a3%e5%86%b3%e4%bd%a0%e7%9a%84%e6%bb%9a%e5%8a%a8%e7%a9%bf%e9%80%8f%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"https:\/\/blog.osvlabs.com\/?p=246","title":{"rendered":"\u522b\u518d\u6eda\u4e86 &#8211; \u73b0\u5728\u5c31\u8981\u89e3\u51b3\u4f60\u7684\u6eda\u52a8\u7a7f\u900f\u95ee\u9898"},"content":{"rendered":"<h1>\u524d\u8a00<\/h1>\n<p>\u65e5\u5e38 web \u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u9047\u5230\u60f3\u8981\u6eda\u52a8\u67d0\u5143\u7d20\uff0c\u4f46\u5374\u5bfc\u81f4\u4e86\u5176\u4ed6\u5143\u7d20\u53d1\u751f\u4e86\u6eda\u52a8\u7684\u95ee\u9898\u3002<\/p>\n<p>\u6bd4\u5982\u6211\u4eec\u67d0\u5143\u7d20\u4f7f\u7528\u4e86\u6d6e\u5c42\uff0c\u5f53\u6d6e\u5c42\u65e0\u6cd5\u6ed1\u52a8\u65f6\uff0c\u6211\u4eec\u5c1d\u8bd5\u6ed1\u52a8\u6d6e\u5c42\uff0c\u4f1a\u53d1\u73b0\u6d6e\u5c42\u4e0b\u7684\u5143\u7d20\uff08\u901a\u5e38\u6765\u8bf4\u662f\u9875\u9762\uff09\u53d1\u751f\u4e86\u6eda\u52a8\uff0c\u8fd9\u5c31\u662f\u6eda\u52a8\u7a7f\u900f\u3002<\/p>\n<p>\u800c\u5143\u7d20\u6eda\u52a8\u5230\u5e95\u65f6\uff0c\u518d\u5c1d\u8bd5\u6eda\u52a8\u4f1a\u5bfc\u81f4\u5143\u7d20\u7684\u53ef\u6eda\u52a8\u7236\u7ea7\u5f00\u59cb\u6eda\u52a8\uff0c\u8fd9\u5c31\u662f\u6eda\u52a8\u94fe(Scroll Chaining)\uff0c\u5982\u4e0b demo:<\/p>\n<p><iframe height=\"300\" style=\"width: 100%;\" scrolling=\"no\" title=\"\u6eda\u52a8\u7a7f\u900f\" src=\"https:\/\/codepen.io\/hnsxxscyx\/embed\/qBpbErW?default-tab=html%2Cresult\" frameborder=\"no\" loading=\"lazy\" allowtransparency=\"true\" allowfullscreen=\"true\"><br \/>\n  See the Pen <a href=\"https:\/\/codepen.io\/hnsxxscyx\/pen\/qBpbErW\"><br \/>\n  \u6eda\u52a8\u7a7f\u900f<\/a> by \u4e0d\u5f97\u4e0d\u9519 (<a href=\"https:\/\/codepen.io\/hnsxxscyx\">@hnsxxscyx<\/a>)<br \/>\n  on <a href=\"https:\/\/codepen.io\">CodePen<\/a>.<br \/>\n<\/iframe><\/p>\n<p>\u901a\u5e38\u6765\u8bf4\u8fd9\u5e76\u4e0d\u662f\u4ec0\u4e48\u95ee\u9898\uff0c\u5c24\u5176\u662f\u5728\u684c\u9762\u7aef\uff0c\u4f46\u79fb\u52a8\u7aef\u7684\u6eda\u52a8\u4f1a\u5c24\u5176\u8ba9\u7528\u6237\u611f\u89c9\u5947\u602a\u3002<\/p>\n<p>\u5982\u679c\u4f60\u4e5f\u9047\u5230\u4e86\u8fd9\u6837\u7684\u95ee\u9898\uff0c\u90a3\u4e0d\u59a8\u4ece\u4e0b\u9762\u627e\u4e00\u4e0b\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<h1>\u539f\u56e0<\/h1>\n<p>\u901a\u5e38\u7684\u6eda\u52a8\u4e0d\u662f\u6211\u4eec\u81ea\u5df1\u5b9e\u73b0\u7684\uff0c\u5229\u7528 transform \u7b49\u6a21\u62df scroll \u7684\u5e93\u4e5f\u4e0d\u4f1a\u6709\u6eda\u52a8\u7a7f\u900f\u7684\u73b0\u8c61\u53d1\u751f\u3002<\/p>\n<p>\u662f\u56e0\u4e3a\u5b50\u5143\u7d20\u7684 scroll \u4e8b\u4ef6\u5192\u6ce1\u5230\u6839\u8282\u70b9\uff0c\u5bfc\u81f4\u6839\u8282\u70b9\u8fdb\u884c\u6eda\u52a8\u4e86\u5417\uff1f<\/p>\n<p>\u5b9e\u9645\u4e0a\u5e76\u4e0d\u662f\uff0c\u5728\u5b50\u5143\u7d20\u4e0a\uff0cscroll event \u5176\u5b9e\u662f\u4e0d\u5192\u6ce1\u7684\uff0c\u53c2\u89c1!(MDN)[<a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/API\/Element\/scroll_event]\u3002\u800c\">https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/API\/Element\/scroll_event]\u3002\u800c<\/a> document \u4e0a \u7684\u6eda\u52a8\u662f\u5192\u6ce1\u7684\uff0c\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u6211\u4eec\u76d1\u542c\u9875\u9762\u6eda\u52a8\u65f6\u53ef\u4ee5\u5c06\u76d1\u542c\u4e8b\u4ef6\u6302\u8f7d\u5230 document \u6216 window \u4e0a\u3002<\/p>\n<p><!-- \u5176\u5b9e\u8fd9\u79cd\u73b0\u8c61\u867d\u7136\u5947\u602a\uff0c\u4f46\u6d4f\u89c8\u5668\u5382\u5546\u7684\u5b9e\u73b0\u662f\u6ca1\u6709\u95ee\u9898\u7684\uff0c\u4e00\u8d77\u6765\u770b\u4e00\u4e0b[W3C \u7684\u89c4\u8303](https:\/\/www.w3.org\/TR\/2016\/WD-cssom-view-1-20160317\/#scrolling-events)\u3002\n\u91cd\u70b9\u653e\u5728\u8fd9\u4e00\u6bb5\uff1a\n```\nWhenever an element gets scrolled (whether in response to user interaction or by an API), the user agent must run these steps:\n    Let doc be the element\u2019s node document.\n    If the element is already in doc\u2019s pending scroll event targets, abort these steps.\n    Append the element to doc\u2019s pending scroll event targets.\n``` --><\/p>\n<p>\u90a3\u4e3a\u4ec0\u4e48\u4f1a\u8fd9\u6837\u5462\uff1f\u6211\u60f3\u6ed1\u52a8\u7684\u660e\u660e\u662f\u5b50\u5143\u7d20\uff0c\u7236\u7ea7\u5143\u7d20\u5374\u6eda\u52a8\u8d77\u6765\u4e86\uff0c<a href=\"https:\/\/www.w3.org\/TR\/2016\/WD-cssom-view-1-20160317\/#scrolling-events\">W3C \u7684\u89c4\u8303<\/a> \u4e5f\u6ca1\u8981\u6c42\u8fd9\u6837\u554a\u3002<\/p>\n<p>\u6362\u4e2a\u8bf4\u6cd5\u6765\u8bf4\u89c4\u8303\u53ef\u80fd\u66f4\u597d\u7406\u89e3\u4e00\u4e9b\uff0c\u89c4\u8303\u4e0d\u662f\u7528\u6237\u624b\u518c\uff0c\u5b83\u53ea\u4f1a\u89c4\u5b9a\u4e86\u4f60\u8981\u6709\u54ea\u4e9b\u7279\u6027\u4ee5\u53ca\u5982\u4f55\u5b9e\u73b0\u8fd9\u4e9b\u7279\u6027\uff0c\u4f46\u5b83\u4e0d\u4f1a\u89c4\u5b9a\u4f60\u4e0d\u8981\u5b9e\u73b0\u67d0\u4e9b\u7279\u6027\u3002\u800c\u5404\u5927\u6d4f\u89c8\u5668\u5382\u5546\u4e0d\u7ea6\u800c\u540c\u7684\u9009\u62e9\u4e86\u8fd9\u6837\u7684\u6a21\u5f0f\uff1a\u5f53\u5c1d\u8bd5\u6eda\u52a8\u76ee\u6807\u5143\u7d20\u65f6\uff0c\u5982\u679c\u5143\u7d20\u4e0d\u80fd\u6eda\u52a8\uff0c\u90a3\u5c31\u53bb\u5c1d\u8bd5\u8ba9\u5b83\u7684\u7236\u7ea7\u5143\u7d20\u8fdb\u884c\u6eda\u52a8\uff0c\u54ea\u4e2a\u80fd\u6eda\u6eda\u54ea\u4e2a\u3002<\/p>\n<p>\u4e0e\u6b64\u4e00\u81f4\u7684\u8fd8\u6709\u6eda\u52a8\u94fe(Scroll Chaining), \u5f53\u6eda\u52a8\u5143\u7d20\u6eda\u52a8\u5230\u5e95\u90e8\u6216\u9876\u90e8\u65f6\uff0c\u518d\u8fdb\u884c\u6eda\u52a8(PC \u9700\u8981\u4f7f\u7528\u6eda\u8f6e)\uff0c\u4f1a\u5e26\u52a8\u5916\u5c42\u5143\u7d20\u6216\u9875\u9762\u7ee7\u7eed\u6eda\u52a8\u3002<\/p>\n<p>\u53c2\u8003\u8fd9\u4e2a codepen, \u6eda\u52a8.scroll-wrapper-2 \u5143\u7d20\u5230\u5e95\u65f6\uff0c\u7ee7\u7eed\u6eda\u52a8\u4f1a\u4f7f.scroll-wrapper-1 \u5f00\u59cb\u6eda\u52a8\uff0c\u800c.scroll-wrapper-1 \u6eda\u52a8\u5230\u5e95\u65f6\uff0c\u4f1a\u5e26\u52a8\u9875\u9762\u6eda\u52a8\u3002<br \/>\n\u4e86\u89e3\u4e86\u539f\u56e0\uff0c\u95ee\u9898\u5c31\u597d\u89e3\u51b3\u4e86\u3002<\/p>\n<h1>\u5982\u4f55\u89e3\u51b3<\/h1>\n<h2>\u6eda\u52a8\u7a7f\u900f<\/h2>\n<p>\u5f53\u6709 mask \u65f6\uff0c\u6211\u4eec\u628a document \u53d8\u4e3a\u4e0d\u53ef\u6eda\u52a8\u7684\u5373\u53ef\u3002<\/p>\n<p>\u901a\u5e38\u60c5\u51b5\u4e0b\u6211\u4eec\u90fd\u53ef\u4ee5\u76f4\u63a5\u7ed9 body \u6dfb\u52a0 overflow: hidden \u5c5e\u6027\uff0c\u8fd9\u6837\u522b\u8bf4\u6eda\u52a8\u7a7f\u900f\uff0c\u8fde\u9875\u9762\u7684\u6eda\u52a8\u90fd\u88ab\u9650\u5236\u4e86\uff0c\u81ea\u7136\u4e0d\u4f1a\u4ea7\u751f\u6eda\u52a8\u4e86\uff08bootstrap \u4e5f\u662f\u8fd9\u6837\u505a\u7684\uff0c\u53ef\u4ee5\u770b\u8fd9\u4e2a<a href=\"https:\/\/codepen.io\/hnsxxscyx\/pen\/jOYwLYe\">demo<\/a>)\u3002<\/p>\n<p>\u518d\u7ed9\u60f3\u8981\u53ef\u4ee5\u6eda\u52a8\u7684\u5143\u7d20(\u5982\u5f39\u7a97)\u6dfb\u52a0\u4e0a\u76f8\u5e94\u7684 overflow \u5c5e\u6027\u503c\uff0c\u8fd9\u6837\u5f39\u7a97\u4e0a\u7684\u5143\u7d20\u4e5f\u53ef\u4ee5\u6eda\u52a8\u3002<\/p>\n<p>\u901a\u5e38\u6765\u8bf4\u6eda\u52a8\u7a7f\u900f\u7684\u95ee\u9898\u8fd9\u6837\u5c31\u53ef\u4ee5\u89e3\u51b3\u4e86\uff0c\u54ea\u6015\u662f\u591a\u5c42\u5d4c\u5957\u7684\u95ee\u9898\uff0c\u4e5f\u53ef\u4ee5\u5957\u7528\u8fd9\u4e2a\u6a21\u677f\u6765\u89e3\u51b3\uff1a\u53ea\u8ba9\u5141\u8bb8\u7684\u90e8\u5206\u53d1\u751f\u6eda\u52a8\u3002<\/p>\n<h2>\u6eda\u52a8\u94fe(Scroll Chaining)<\/h2>\n<p>\u611f\u8c22 W3C\uff0c\u4e3a\u6211\u4eec\u5e26\u6765\u4e86\u597d\u7528\u7684<a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/CSS\/overscroll-behavior\">overscroll-behavior<\/a> \u5c5e\u6027\uff0c\u6211\u5148\u6765\u7b80\u5355\u4ecb\u7ecd\u4e00\u4e0b\u5b83\u3002<\/p>\n<pre><code class=\"language-css\">overscroll-behavior: [ contain | none | auto ]{1,2};<\/code><\/pre>\n<p>auto \u4f5c\u4e3a\u9ed8\u8ba4\u503c\u6ca1\u4ec0\u4e48\u597d\u8bf4\u7684\uff0c\u91cd\u70b9\u5728\u4e8e contain \u4e0e none \u503c\u3002<\/p>\n<p><b>contain<\/b> \u5c5e\u6027\u4fdd\u7559\u4e86\u9ed8\u8ba4\u7684\u6eda\u52a8\u884c\u4e3a\uff0c\u4f46\u5b83\u4e0d\u4f1a\u4f20\u9012\u6eda\u52a8\u884c\u4e3a\uff0c\u5c31\u50cf\u6211\u53ef\u4ee5\u5728\u76ee\u6807\u5143\u7d20\u5185\u8fdb\u884c\u4e0b\u62c9\u5237\u65b0\u7684\u64cd\u4f5c\uff0c\u4f46\u4e0d\u8bba\u5982\u4f55\u6eda\u52a8\uff0c\u6eda\u52a8\u884c\u4e3a\u59cb\u7ec8\u88ab\u5c40\u9650\u5728\u6b64\u5143\u7d20\u5185\u3002<\/p>\n<p><b>none<\/b> \u5c5e\u6027\u79fb\u9664\u4e86\u6eda\u52a8\u8fb9\u754c\u7684\u4e00\u4e9b\u884c\u4e3a\uff0c\u5143\u7d20\u59cb\u7ec8\u4e5f\u4e0d\u80fd\u8d85\u8fc7\u5176\u6eda\u52a8\u8fb9\u754c\uff0c\u5f53\u7136\uff0c\u5b83\u4e5f\u628a\u6eda\u52a8\u884c\u4e3a\u9650\u5236\u5230\u4e86\u5143\u7d20\u5185\u3002<\/p>\n<p>\u8fd9\u4e24\u4e2a\u5c5e\u6027\u4e3b\u8981\u5728\u79fb\u52a8\u7aef\u7684\u5b9e\u9645\u8868\u73b0\u6709\u6240\u4e0d\u540c\uff08PC \u7aef\u901a\u5e38\u6ca1\u6709\u5143\u7d20\u9700\u8981\u8de8\u8d8a\u6eda\u52a8\u8fb9\u754c\u7684\u7279\u6027\uff09\u3002<\/p>\n<p>\u559c\u5927\u666e\u5954\uff0c\u4e8b\u60c5\u5b8c\u7f8e\u88ab\u89e3\u51b3\u4e86\uff0c\u5982\u679c\u4f60\u4e0d\u9700\u8981\u517c\u5bb9 Safari \u7684\u8bdd\u3002<\/p>\n<p>\u8fde IE \u90fd\u53ef\u4ee5\u4f7f\u7528-ms-scroll-chaining \u6765\u8fd1\u4f3c\u5b9e\u73b0\u8fd9\u4e00\u6548\u679c\uff0c\u4f46\u65e0\u8bba\u662f\u684c\u9762\u7aef\u8fd8\u662f\u79fb\u52a8\u7aef\uff0cSafari \u76ee\u524d\u90fd\u4e0d\u652f\u6301\u8fd9\u4e00\u7279\u6027\uff0c\u552f\u4e00\u8ba9\u4eba\u611f\u89c9\u6709\u5e0c\u671b\u7684\u5e94\u8be5\u5c31\u662f\u53ef\u4ee5\u5728 developer menu \u4e2d\u5f00\u542f\u5bf9\u5b83\u7684\u652f\u6301\uff0c\u60f3\u5fc5\u6b63\u5f0f\u652f\u6301\u4e5f\u5feb\u4e86\u5427\u3002<\/p>\n<p>\u5982\u679c\u8bf4\u684c\u9762\u7aef\u7684 Safari \u8fd8\u53ef\u4ee5\u5ffd\u7565\u7684\u8bdd\uff0ciOS \u7684\u5e02\u5360\u7387\u51b3\u5b9a\u4e86\u5fc5\u987b\u8981\u5bf9\u8fd9\u4e00\u95ee\u9898\u8fdb\u884c\u4fee\u590d\u3002\u5bf9\u4e8e iOS \u7cfb\u7edf\u6765\u8bf4\uff0c\u5b83\u4e0d\u5141\u8bb8\u6d4f\u89c8\u5668\u4f7f\u7528\u5176\u4ed6\u5185\u6838\uff0c\u6240\u4ee5 Chrome \u66f4\u50cf\u662f\u5957\u4e86\u4e00\u5c42 Safari \u5185\u6838\u7684\u58f3\uff0c\u6240\u4ee5\u4e0d\u7ba1\u7528\u4ec0\u4e48\u6d4f\u89c8\u5668\uff0c\u5b83\u90fd\u6ca1\u6709\u652f\u6301\u8fd9\u4e00\u7279\u6027\u3002<\/p>\n<p>\u672a\u6765\u53ef\u80fd\u662f\u7f8e\u597d\u7684\uff0c\u4f46\u73b0\u5728\u8fd8\u662f\u9700\u8981\u81ea\u5df1\u52a8\u624b\u3002<\/p>\n<p>\u5e94\u7528\u5143\u7d20\u4e0a\u7684\u6eda\u52a8\u4e8b\u4ef6\u5e76\u4e0d\u80fd\u4f7f\u7528 preventDefault \u6765\u963b\u6b62\u6eda\u52a8\u884c\u4e3a\uff0cscroll event \u7684 cancelable \u5c5e\u6027\u662f false\u3002\u4e5f\u53ef\u4ee5\u8fd9\u6837\u60f3\uff0cscroll \u7684\u6548\u679c\u5728\u5148\uff0cscroll event \u5728\u540e\uff0c\u5f53 listener \u62ff\u5230 event \u65f6\uff0c\u5b83\u5df2\u7ecf\u53d1\u751f\u6eda\u52a8\u4e86\uff0c\u603b\u4e0d\u80fd\u8ba9\u5143\u7d20\u518d\u6eda\u56de\u6765\u5427\u3002<\/p>\n<p>\u90a3\u6211\u4eec\u5c31\u8981\u4ece\u5176\u4ed6\u65b9\u5411\u5165\u624b\uff0c\u6bd4\u5982\u662f\u4ec0\u4e48\u5bfc\u81f4\u4e86\u6eda\u52a8\u3002<\/p>\n<p>\u5728\u684c\u9762\u7aef\uff0c\u901a\u5e38\u662f\u7528\u6eda\u8f6e\u6eda\u52a8\u3001\u6ed1\u52a8\u89e6\u6478\u677f\u4e0e\u62d6\u62fd\u6eda\u52a8\u6761\uff0c\u800c\u79fb\u52a8\u7aef\uff0c\u81ea\u7136\u662f<a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/API\/Touch_events\/Using_Touch_Events\">Touch<\/a> \u76f8\u5173\u7684\u4e8b\u4ef6\u3002<\/p>\n<p>\u6b64\u5904\u4ec5\u4ee5\u79fb\u52a8\u7aef\u4e3a\u4f8b\uff0c\u684c\u9762\u7aef\u5c06 touch \u76f8\u5173\u7684\u4e8b\u4ef6\u6362\u4e3a<a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/API\/WheelEvent\">Wheel<\/a> \u4e8b\u4ef6\u5373\u53ef\uff08\u6ce8\u610f<a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/API\/MouseScrollEvent\">MouseScrollEvent<\/a> \u5df2\u7ecf\u9010\u6e10\u88ab\u5e9f\u5f03\uff09\u3002<\/p>\n<p>touch \u4e8b\u4ef6\u662f\u53ef\u4ee5\u88ab preventDefault \u7684\uff0c\u6240\u4ee5\u6211\u4eec\u963b\u6b62\u8d8a\u754c\u6eda\u52a8\u7684\u601d\u8def\u662f\u8fd9\u6837\uff1a<\/p>\n<p><em>\u53d6\u6d88touch \u6548\u679c\uff0c\u4e0d\u53d1\u751f\u6eda\u52a8 &lt;-  \u76d1\u542ctouch \u4e8b\u4ef6\u6765\u5224\u65ad\u6eda\u52a8\u65b9\u5411\uff0c\u5224\u65ad\u5143\u7d20\u662f\u5426\u8981\u8d8a\u8fc7\u5143\u7d20\u8fb9\u7f18\u6eda\u52a8 &lt;- \u5224\u65adtouch \u7684\u5bf9\u8c61\uff0c\u662f\u5426\u4e3a\u8981\u9650\u5236\u7684\u5143\u7d20<\/em><\/p>\n<p>\u8ba9\u6211\u4eec\u4ece\u60f3\u5230\u7684\u6548\u679c\u5f00\u59cb\uff0c\u4e00\u6b65\u4e00\u6b65\u6765\u770b\u3002<\/p>\n<h3>\u53d6\u6d88 touch \u6548\u679c<\/h3>\n<p>touch \u4e8b\u4ef6\u6709 touchstart\u3001touchend\u3001touchmove \u7b49\u4e8b\u4ef6\u7c7b\u578b\uff0c\u5b9e\u9645\u5bfc\u81f4\u6eda\u52a8\u7684\u81ea\u7136\u662f touchmove \u4e8b\u4ef6\uff0c\u6240\u4ee5\u6211\u4eec\u5bf9\u5143\u7d20\u589e\u52a0\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u5728\u4e8b\u4ef6\u56de\u8c03\u4e2d\u5224\u65ad cancelable\uff0c\u7136\u540e\u6267\u884c preventDefault\uff1a<\/p>\n<pre><code class=\"language-js\">targetEl.addEventListener(\n    &#039;touchstart&#039;,\n    (event) =&gt; {\n        if (event.cancelable) {\n            event.preventDefault();\n        }\n    },\n    false\n); \/\/ \u6ce8\u610fpassive \u8981\u8bbe\u4e3afalse<\/code><\/pre>\n<h3>\u5224\u65ad\u5143\u7d20\u662f\u5426\u8981\u8d8a\u8fc7\u5143\u7d20\u8fb9\u7f18\u6eda\u52a8<\/h3>\n<p>touch \u76f8\u5173\u7684\u4e8b\u4ef6\u5e76\u6ca1\u6709\u83b7\u53d6\u6ed1\u52a8\u65b9\u5411\u7684\u76f8\u5173\u5c5e\u6027\uff0c\u6240\u4ee5\u6211\u4eec\u9700\u8981\u81ea\u5df1\u8ba1\u7b97\u6eda\u52a8\u7684\u65b9\u5411\u3002<br \/>\n\u53ef\u4ee5\u8bb0\u5f55 touchstart \u4e8b\u4ef6\u7684\u5750\u6807\uff0c\u4ee5\u5b83\u7684\u5750\u6807\u4e3a\u539f\u70b9\u8fdb\u884c\u8ba1\u7b97\u3002<br \/>\n\u4e3a\u4e86\u7b80\u5316\u4ee3\u7801\u53ca\u66f4\u6e05\u695a\u7684\u8bf4\u660e\u76f8\u5173\u903b\u8f91\uff0c\u6211\u4eec\u4ee5\u6700\u5e38\u7528\u7684\u4e0a\u4e0b\u6ed1\u52a8\u6765\u4e3e\u4f8b\uff1a<\/p>\n<pre><code class=\"language-js\">let touchStartY;\n\nconst recordTouchStart = (event) =&gt; {\n    touchStartY = event.touches ? event.touches[0].screenY : event.screenY;\n};\nconst preventTouchMove = (event) =&gt; {\n    let allowScroll = false;\n\n    const el = targetEl;\n    const currentTouchY = event.touches\n        ? event.touches[0].screenY\n        : event.screenY;\n    const isOverTop = touchStartY &lt;= currentTouchY &amp;&amp; el.scrollTop === 0;\n    const isOverBottom =\n        touchStartY &gt;= currentTouchY &amp;&amp;\n        el.scrollHeight - el.scrollTop &lt;= el.offsetHeight;\n    if (!(isOverBottom || isOverTop)) {\n        allowScroll = true;\n    }\n\n    if (!allowScroll) {\n        if (event.cancelable) {\n            event.preventDefault();\n        }\n        event.stopPropagation();\n    }\n};\n\nif (\n    window &amp;&amp;\n    window.navigator &amp;&amp;\n    window.navigator.userAgent.match(\/iPhone|iPad\/)\n) {\n    targetEl.addEventListener(&#039;touchstart&#039;, recordTouchStart, { passive: false });\n    targetEl.addEventListener(&#039;touchmove&#039;, preventTouchMove, { passive: false });\n}<\/code><\/pre>\n<h3>\u5224\u65ad touch \u7684\u5bf9\u8c61\uff0c\u662f\u5426\u4e3a\u8981\u9650\u5236\u7684\u5143\u7d20<\/h3>\n<p>\u4ee5\u4e0a\u7684\u4ee3\u7801\u5176\u5b9e\u5df2\u7ecf\u53ef\u4ee5\u89e3\u51b3\u6eda\u52a8\u94fe\u7684\u95ee\u9898\u4e86\uff0c\u4f46\u5982\u679c\u6709\u591a\u4e2a\u5143\u7d20\u9700\u8981\u6eda\u52a8\u65f6\uff0c\u591a\u4e2a\u76d1\u542c\u5668\u4e0d\u597d\u7ef4\u62a4\u3002\u540c\u65f6 touch \u4e8b\u4ef6\u4e5f\u662f\u53ef\u4ee5\u8de8\u5143\u7d20\u7684\uff0c\u89e6\u6478\u65f6\u4e5f\u6709\u53ef\u80fd\u51fa\u73b0\u95ee\u9898\u3002<br \/>\n\u6700\u597d\u7684\u65b9\u6cd5\u8fd8\u662f\u52a0\u4e0a\u4e8b\u4ef6\u59d4\u6258\uff0c\u505a\u8fdb\u4e00\u6b65\u7684\u9650\u5236\u3002<\/p>\n<pre><code class=\"language-js\">let touchStartY;\n\nconst recordTouchStart = (event) =&gt; {\n    if (targetElWrapper.contains(event.target)) {\n        touchStartY = event.touches ? event.touches[0].screenY : event.screenY;\n    }\n};\nconst preventTouchMove = (event) =&gt; {\n    let allowScroll = false;\n    if (targetElWrapper.contains(event.target)) {\n        const el = targetEl;\n        const currentTouchY = event.touches\n            ? event.touches[0].screenY\n            : event.screenY;\n        const isOverTop = touchStartY &lt;= currentTouchY &amp;&amp; el.scrollTop === 0;\n        const isOverBottom =\n            touchStartY &gt;= currentTouchY &amp;&amp;\n            el.scrollHeight - el.scrollTop &lt;= el.offsetHeight;\n        if (!(isOverBottom || isOverTop)) {\n            allowScroll = true;\n        }\n    }\n\n    if (!allowScroll) {\n        if (event.cancelable) {\n            event.preventDefault();\n        }\n        event.stopPropagation();\n    }\n};\n\nif (\n    window &amp;&amp;\n    window.navigator &amp;&amp;\n    window.navigator.userAgent.match(\/iPhone|iPad\/)\n) {\n    document.addEventListener(&#039;touchstart&#039;, recordTouchStart, { passive: false });\n    document.addEventListener(&#039;touchmove&#039;, preventTouchMove, { passive: false });\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 \u65e5\u5e38 web \u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u9047\u5230\u60f3\u8981\u6eda\u52a8\u67d0\u5143\u7d20\uff0c\u4f46\u5374\u5bfc\u81f4\u4e86\u5176\u4ed6\u5143\u7d20\u53d1\u751f\u4e86\u6eda\u52a8\u7684\u95ee\u9898\u3002 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