{"id":7979,"date":"2023-11-28T20:09:12","date_gmt":"2023-11-28T12:09:12","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=7979"},"modified":"2023-12-02T20:02:21","modified_gmt":"2023-12-02T12:02:21","slug":"vue-zhong-emitononceoff-li-jie","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/vue-zhong-emitononceoff-li-jie\/","title":{"rendered":"Vue \u4e2d emit\u3001on\u3001once\u3001off \u7684\u7406\u89e3\uff1f"},"content":{"rendered":"<p>\u5728 Vue \u4e2d\uff0c<code>$emit<\/code>\u3001<code>$on<\/code>\u3001<code>$once<\/code> \u548c <code>$off<\/code> \u662f\u7528\u4e8e\u81ea\u5b9a\u4e49\u4e8b\u4ef6\u5904\u7406\u7684\u65b9\u6cd5\uff0c\u901a\u5e38\u7528\u4e8e\u7236\u5b50\u7ec4\u4ef6\u4e4b\u95f4\u6216\u7ec4\u4ef6\u5185\u90e8\u7684\u4e8b\u4ef6\u901a\u4fe1\u3002<\/p>\n<h3><a id=\"emit%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a><code>$emit<\/code>\uff1a<\/h3>\n<ul>\n<li><strong><code>$emit(eventName, [args])<\/code>\uff1a<\/strong> \u7528\u4e8e\u5728\u7ec4\u4ef6\u5185\u90e8\u89e6\u53d1\u81ea\u5b9a\u4e49\u4e8b\u4ef6\u3002\u5b83\u5141\u8bb8\u5728\u7ec4\u4ef6\u5185\u90e8\u89e6\u53d1\u4e00\u4e2a\u4e8b\u4ef6\uff0c\u5e76\u4e14\u53ef\u4ee5\u4f20\u9012\u53c2\u6570\u3002\u901a\u5e38\u5728\u5b50\u7ec4\u4ef6\u4e2d\u4f7f\u7528\uff0c\u7528\u6765\u5411\u7236\u7ec4\u4ef6\u53d1\u9001\u6d88\u606f\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-javascript\">\/\/ \u5728\u5b50\u7ec4\u4ef6\u4e2d\u89e6\u53d1\u81ea\u5b9a\u4e49\u4e8b\u4ef6\nthis.$emit('customEvent', data);\n<\/code><\/pre>\n<h3><a id=\"on%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a><code>$on<\/code>\uff1a<\/h3>\n<ul>\n<li><strong><code>$on(eventName, callback)<\/code>\uff1a<\/strong> \u7528\u4e8e\u5728\u7ec4\u4ef6\u5b9e\u4f8b\u4e0a\u76d1\u542c\u7279\u5b9a\u4e8b\u4ef6\u7684\u89e6\u53d1\u3002\u5f53\u89e6\u53d1\u76f8\u5e94\u7684\u81ea\u5b9a\u4e49\u4e8b\u4ef6\u65f6\uff0c\u8be5\u4e8b\u4ef6\u5c06\u4f1a\u88ab\u6355\u83b7\u5e76\u6267\u884c\u56de\u8c03\u51fd\u6570\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-javascript\">\/\/ \u5728\u7ec4\u4ef6\u5b9e\u4f8b\u4e2d\u76d1\u542c\u81ea\u5b9a\u4e49\u4e8b\u4ef6\nthis.$on('customEvent', (data) =&gt; {\n  \/\/ \u5904\u7406\u63a5\u6536\u5230\u7684\u6570\u636e\n});\n<\/code><\/pre>\n<h3><a id=\"once%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a><code>$once<\/code>\uff1a<\/h3>\n<ul>\n<li><strong><code>$once(eventName, callback)<\/code>\uff1a<\/strong> \u4e0e <code>$on<\/code> \u7c7b\u4f3c\uff0c\u4f46\u662f\u5b83\u53ea\u76d1\u542c\u4e00\u6b21\u7279\u5b9a\u7684\u4e8b\u4ef6\u3002\u5f53\u4e8b\u4ef6\u88ab\u89e6\u53d1\u5e76\u6267\u884c\u4e86\u56de\u8c03\u51fd\u6570\u540e\uff0c\u8be5\u76d1\u542c\u5668\u5c06\u88ab\u81ea\u52a8\u79fb\u9664\uff0c\u4e0d\u518d\u63a5\u6536\u540e\u7eed\u76f8\u540c\u4e8b\u4ef6\u7684\u89e6\u53d1\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-javascript\">\/\/ \u53ea\u76d1\u542c\u4e00\u6b21\u81ea\u5b9a\u4e49\u4e8b\u4ef6\nthis.$once('customEvent', (data) =&gt; {\n  \/\/ \u5904\u7406\u63a5\u6536\u5230\u7684\u6570\u636e\n});\n<\/code><\/pre>\n<h3><a id=\"off%EF%BC%9A\" class=\"anchor\" aria-hidden=\"true\"><span class=\"octicon octicon-link\"><\/span><\/a><code>$off<\/code>\uff1a<\/h3>\n<ul>\n<li><strong><code>$off([eventName, callback])<\/code>\uff1a<\/strong> \u7528\u4e8e\u79fb\u9664\u81ea\u5b9a\u4e49\u4e8b\u4ef6\u7684\u76d1\u542c\u5668\u3002\u53ef\u4ee5\u6839\u636e\u9700\u8981\u9009\u62e9\u6027\u5730\u79fb\u9664\u7279\u5b9a\u4e8b\u4ef6\u7684\u7279\u5b9a\u76d1\u542c\u5668\u6216\u79fb\u9664\u6240\u6709\u76d1\u542c\u5668\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-javascript\">\/\/ \u79fb\u9664\u7279\u5b9a\u4e8b\u4ef6\u7684\u7279\u5b9a\u76d1\u542c\u5668\nthis.<span class=\"katex math inline\">off('customEvent', callback);\n\n\/\/ \u79fb\u9664\u6240\u6709\u76d1\u542c\u5668\nthis.<\/span>off();\n<\/code><\/pre>\n<p>\u8fd9\u4e9b\u65b9\u6cd5\u4f7f\u5f97 Vue \u7ec4\u4ef6\u4e4b\u95f4\u53ef\u4ee5\u8fdb\u884c\u7075\u6d3b\u7684\u4e8b\u4ef6\u901a\u4fe1\uff0c\u901a\u8fc7\u81ea\u5b9a\u4e49\u4e8b\u4ef6\u5b9e\u73b0\u4e86\u7ec4\u4ef6\u95f4\u7684\u89e3\u8026\u548c\u901a\u4fe1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728 Vue \u4e2d\uff0c$emit\u3001$on\u3001$once \u548c $off \u662f\u7528\u4e8e\u81ea\u5b9a\u4e49\u4e8b\u4ef6\u5904\u7406\u7684\u65b9\u6cd5\uff0c\u901a\u5e38\u7528\u4e8e\u7236\u5b50\u7ec4\u4ef6\u4e4b\u95f4 [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-7979","post","type-post","status-publish","format-standard","hentry","category-vue"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7979","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=7979"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7979\/revisions"}],"predecessor-version":[{"id":14010,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7979\/revisions\/14010"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=7979"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=7979"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=7979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}