{"id":39,"date":"2022-12-01T12:33:15","date_gmt":"2022-12-01T04:33:15","guid":{"rendered":"http:\/\/www.guoqw.cn\/?p=39"},"modified":"2022-12-01T12:33:15","modified_gmt":"2022-12-01T04:33:15","slug":"vue3-%e7%9b%91%e5%90%ac%e5%99%a8-watch","status":"publish","type":"post","link":"http:\/\/www.guoqw.cn\/?p=39","title":{"rendered":"vue3 \u76d1\u542c\u5668 watch"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>\u4e00\u3001\u76d1\u542c\u57fa\u7840\u7c7b\u578b<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const nums = ref(9)\nwatch(nums, (newValue, oldValue) => {\n    console.log('watch \u89e6\u53d1', newValue)\n})<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4e8c\u3001\u76d1\u542c\u590d\u6742\u7c7b\u578b<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const demo = reactive({\n\tname: '\u5c0f\u90ed',\n\tnickName: '\u4e94\u5f69',\n\tsoulmate: {\n\t\tname: '',\n\t\tnickName: ''\n\t}\n})\n\/\/ \u76d1\u542c\u6574\u4e2a\u5bf9\u8c61\nwatch(demo, (newValue, oldValue) => {\n    console.log('watch \u89e6\u53d1', newValue)\n})\n\/\/\u76d1\u542c\u5bf9\u8c61\u4e2d\u7684\u67d0\u4e2a\u5c5e\u6027\nwatch(() => demo.name, (newValue, oldValue) => {\n    console.log('watch \u89e6\u53d1', newValue)\n})\n\/\/\u53ea\u76d1\u542c\u5bf9\u8c61\u7684\u5b50\u5c5e\u6027\nwatch(() => ({ ...demo }), (newValue, oldValue) => {\n    console.log('watch \u89e6\u53d1', newValue)\n})\n\/\/\u76d1\u542c\u5bf9\u8c61\u7684\u6240\u6709\u5c5e\u6027\nwatch(() => demo, (newValue, oldValue) => {\n\tconsole.log('watch \u89e6\u53d1', newValue)\n}, { deep: true })<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4e09\u3001\u7ec4\u5408\u76d1\u542c<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const demo = reactive({\n\tname: '\u5c0f\u90ed',\n\tnickName: '\u4e94\u5f69',\n\tsoulmate: {\n\t\tname: '',\n\t\tnickName: ''\n\t}\n})\nconst age = ref(18)\nwatch(&#91;() => demo.name, age], (&#91;newName, newNums], &#91;oldName, oldNums]) => {\n\tconsole.log('watch \u5df2\u89e6\u53d1: name', newName)\n\tconsole.log('watch \u5df2\u89e6\u53d1: age', newage)\n})<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u76d1\u542c\u57fa\u7840\u7c7b\u578b \u4e8c\u3001\u76d1\u542c\u590d\u6742\u7c7b\u578b \u4e09\u3001\u7ec4\u5408\u76d1\u542c<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-39","post","type-post","status-publish","format-standard","hentry","category-vue"],"_links":{"self":[{"href":"http:\/\/www.guoqw.cn\/index.php?rest_route=\/wp\/v2\/posts\/39","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.guoqw.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.guoqw.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.guoqw.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.guoqw.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=39"}],"version-history":[{"count":1,"href":"http:\/\/www.guoqw.cn\/index.php?rest_route=\/wp\/v2\/posts\/39\/revisions"}],"predecessor-version":[{"id":40,"href":"http:\/\/www.guoqw.cn\/index.php?rest_route=\/wp\/v2\/posts\/39\/revisions\/40"}],"wp:attachment":[{"href":"http:\/\/www.guoqw.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=39"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.guoqw.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=39"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.guoqw.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=39"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}