{"id":4355,"date":"2025-06-13T09:13:46","date_gmt":"2025-06-17T01:40:46","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4355"},"modified":"2025-06-17T09:13:46","modified_gmt":"2025-06-17T01:40:46","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8vue-js%e7%9a%84%e7%b5%84%e4%bb%b6%e4%be%a6%e5%90%ac%e5%99%a8watch","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/vue-js\/%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8vue-js%e7%9a%84%e7%b5%84%e4%bb%b6%e4%be%a6%e5%90%ac%e5%99%a8watch\/","title":{"rendered":"\u6df1\u5165\u5b78\u7fd2 Vue.js \u7d44\u4ef6\u4fa6\u542c\u5668 (watch) \u7684\u6700\u65b0\u7528\u6cd5\u8207\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"

<\/p>\n

\u6df1\u5165\u5b78\u7fd2 Vue.js \u7d44\u4ef6\u4fa6\u542c\u5668 (watch) \u7684\u6700\u65b0\u7528\u6cd5\u8207\u6700\u4f73\u5be6\u8e10<\/h1>\n

Vue.js \u662f\u4e00\u500b\u8f15\u91cf\u7d1a\u7684 JavaScript \u6846\u67b6\uff0c\u5c08\u70ba\u958b\u767c\u8005\u5feb\u901f\u5275\u5efa\u9ad8\u54c1\u8cea\u7684 Web \u61c9\u7528\u7a0b\u5f0f\u800c\u8a2d\u8a08\u3002\u7d44\u4ef6\u4fa6\u542c\u5668 (watch) \u662f Vue.js \u4e2d\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u529f\u80fd\uff0c\u5b83\u5141\u8a31\u958b\u767c\u8005\u5728\u8cc7\u6599\u8b8a\u66f4\u6642\u57f7\u884c\u7279\u5b9a\u7684\u51fd\u5f0f\uff0c\u5f9e\u800c\u63d0\u5347\u958b\u767c\u6548\u7387\u548c\u61c9\u7528\u7a0b\u5f0f\u7684\u6027\u80fd\u3002<\/p>\n

\u5982\u4f55\u4f7f\u7528 Vue.js \u7d44\u4ef6\u4fa6\u542c\u5668 (watch)<\/h2>\n

\u8981\u4f7f\u7528 Vue.js \u7684\u7d44\u4ef6\u4fa6\u542c\u5668\uff0c\u958b\u767c\u8005\u9700\u5728 Vue \u7d44\u4ef6\u4e2d\u5b9a\u7fa9\u4e00\u500b `watch` \u5c6c\u6027\uff0c\u4e26\u5c07\u5176\u8a2d\u7f6e\u70ba\u4e00\u500b\u7269\u4ef6\uff0c\u8a72\u7269\u4ef6\u5305\u542b\u8981\u76e3\u63a7\u7684\u8cc7\u6599\u548c\u76f8\u61c9\u7684\u51fd\u5f0f\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b Vue \u7d44\u4ef6\uff0c\u5176\u4e2d\u6709\u4e00\u500b\u540d\u70ba `message` \u7684\u8cc7\u6599\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 `watch` \u4f86\u76e3\u63a7 `message` \u7684\u8b8a\u5316\uff0c\u4e26\u5728\u8cc7\u6599\u6539\u8b8a\u6642\u57f7\u884c\u7279\u5b9a\u7684\u51fd\u5f0f\uff1a<\/p>\n

\nwatch: {\n  message(val) {\n    console.log('Message changed to: ' + val);\n    \/\/ \u9019\u88e1\u53ef\u4ee5\u6dfb\u52a0\u66f4\u591a\u8655\u7406\u908f\u8f2f\n  }\n}\n<\/code><\/pre>\n
\u5728\u4e0a\u8ff0\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b `watch` \u5c6c\u6027\uff0c\u4e26\u5c07\u5176\u8a2d\u7f6e\u70ba\u4e00\u500b\u7269\u4ef6\uff0c\u8a72\u7269\u4ef6\u5305\u542b\u8981\u76e3\u63a7\u7684\u8cc7\u6599 `message` \u548c\u57f7\u884c\u7684\u51fd\u5f0f\u3002\u7576 `message` \u7684\u8cc7\u6599\u6539\u8b8a\u6642\uff0c\u8a72\u51fd\u5f0f\u5c07\u6703\u88ab\u81ea\u52d5\u8abf\u7528\uff0c\u4e26\u5c07\u65b0\u7684\u8cc7\u6599\u503c\u4f5c\u70ba\u53c3\u6578\u50b3\u905e\u3002<\/p>\n
Vue.js \u7d44\u4ef6\u4fa6\u542c\u5668 (watch) \u7684\u512a\u9ede<\/h2>\n
\u4f7f\u7528 Vue.js \u7684\u7d44\u4ef6\u4fa6\u542c\u5668 (watch) \u6709\u5e7e\u500b\u986f\u8457\u7684\u512a\u9ede\uff1a<\/p>\n
1. **\u63d0\u9ad8\u958b\u767c\u6548\u7387**\uff1a\u907f\u514d\u4e86\u91cd\u8907\u6aa2\u67e5\u8cc7\u6599\u8b8a\u5316\u7684\u9700\u8981\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u5c08\u6ce8\u65bc\u8655\u7406\u8b8a\u5316\u5f8c\u7684\u908f\u8f2f\u3002
\n2. **\u7c21\u5316\u8cc7\u6599\u7ba1\u7406**\uff1a\u7576\u8cc7\u6599\u767c\u751f\u8b8a\u5316\u6642\uff0c\u81ea\u52d5\u57f7\u884c\u51fd\u5f0f\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u63a7\u5236\u61c9\u7528\u7a0b\u5f0f\u7684\u884c\u70ba\u3002
\n3. **\u64f4\u5c55\u6027**\uff1a\u53ef\u4ee5\u8f15\u9b06\u5730\u5728\u51fd\u5f0f\u5167\u90e8\u6dfb\u52a0\u66f4\u591a\u908f\u8f2f\uff0c\u4f8b\u5982\u9032\u884c API \u8acb\u6c42\u6216\u66f4\u65b0\u5176\u4ed6\u72c0\u614b\u3002<\/p>\n
\u5be6\u4f5c\u7bc4\u4f8b<\/h2>\n
\u4ee5\u4e0b\u662f\u4f7f\u7528\u7d44\u4ef6\u4fa6\u542c\u5668\u7684\u5b8c\u6574 Vue.js \u5be6\u4f5c\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728\u8cc7\u6599\u8b8a\u66f4\u6642\u81ea\u52d5\u66f4\u65b0 UI\uff1a<\/p>\n
\nnew Vue({\n  el: '#app',\n  data: {\n    message: 'Hello, Vue!'\n  },\n  watch: {\n    message(newValue) {\n      console.log('Message updated:', newValue);\n      \/\/ \u5047\u8a2d\u9019\u88e1\u6709\u4e00\u500b\u51fd\u5f0f\u4f86\u66f4\u65b0 UI\n      this.updateUI(newValue);\n    }\n  },\n  methods: {\n    updateUI(updatedMessage) {\n      \/\/ \u66f4\u65b0 UI \u7684\u908f\u8f2f\n      console.log('UI updated with:', updatedMessage);\n    }\n  }\n});\n<\/code><\/pre>\n
\u932f\u8aa4\u6392\u9664\u8207\u5e38\u898b\u554f\u984c<\/h2>\n
\u5728\u4f7f\u7528\u7d44\u4ef6\u4fa6\u542c\u5668\u6642\uff0c\u53ef\u80fd\u6703\u9047\u5230\u4e00\u4e9b\u5e38\u898b\u7684\u932f\u8aa4\uff0c\u4f8b\u5982\uff1a<\/p>\n
– **\u672a\u6b63\u78ba\u5b9a\u7fa9 watch \u5c6c\u6027**\uff1a\u78ba\u4fdd `watch` \u5c6c\u6027\u662f\u5728 Vue \u7d44\u4ef6\u7684\u6b63\u78ba\u4f4d\u7f6e\u5b9a\u7fa9\u7684\u3002
\n– **\u51fd\u5f0f\u672a\u88ab\u8abf\u7528**\uff1a\u78ba\u8a8d\u76e3\u63a7\u7684\u8cc7\u6599\u6b63\u78ba\u5730\u8b8a\u66f4\uff0c\u4ee5\u78ba\u4fdd\u51fd\u5f0f\u6703\u88ab\u57f7\u884c\u3002
\n– **\u6027\u80fd\u554f\u984c**\uff1a\u5982\u679c\u89f8\u767c\u7684\u51fd\u5f0f\u904b\u884c\u6642\u9593\u904e\u9577\uff0c\u53ef\u80fd\u6703\u5f71\u97ff\u61c9\u7528\u6027\u80fd\uff0c\u5efa\u8b70\u4f7f\u7528\u9632\u6296\u6216\u7bc0\u6d41\u6280\u8853\u4f86\u512a\u5316\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
Vue.js \u7684\u7d44\u4ef6\u4fa6\u542c\u5668 (watch) \u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u529f\u80fd\uff0c\u5b83\u53ef\u4ee5\u8b93\u958b\u767c\u8005\u5728\u8cc7\u6599\u6539\u8b8a\u6642\u57f7\u884c\u7279\u5b9a\u7684\u51fd\u5f0f\uff0c\u5f9e\u800c\u63d0\u9ad8\u958b\u767c\u6548\u7387\u548c\u61c9\u7528\u7684\u53ef\u7dad\u8b77\u6027\u3002\u96a8\u8457 Vue.js \u7684\u6301\u7e8c\u9032\u5316\uff0c\u4e86\u89e3\u548c\u904b\u7528\u6700\u65b0\u7684\u6700\u4f73\u5be6\u8e10\u5c0d\u65bc\u958b\u767c\u8005\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n
Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n
1. \u7d44\u4ef6\u4fa6\u542c\u5668 (watch) \u8207\u8a08\u7b97\u5c6c\u6027 (computed) \u6709\u4f55\u4e0d\u540c\uff1f<\/h3>\n
\u7d44\u4ef6\u4fa6\u542c\u5668\u4e3b\u8981\u7528\u65bc\u76e3\u63a7\u8cc7\u6599\u8b8a\u5316\u4e26\u57f7\u884c\u51fd\u5f0f\uff0c\u800c\u8a08\u7b97\u5c6c\u6027\u5247\u662f\u6839\u64da\u5176\u4ed6\u8cc7\u6599\u7684\u8b8a\u5316\u81ea\u52d5\u8a08\u7b97\u51fa\u65b0\u503c\u3002\u4f7f\u7528\u6642\u9700\u6839\u64da\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u5f0f\u3002<\/p>\n
2. \u80fd\u5426\u4f7f\u7528\u591a\u500b\u8cc7\u6599\u4f5c\u70ba\u76e3\u63a7\u5c0d\u8c61\uff1f<\/h3>\n
\u662f\u7684\uff0c\u60a8\u53ef\u4ee5\u5728 `watch` \u4e2d\u5b9a\u7fa9\u591a\u500b\u8cc7\u6599\u5c6c\u6027\u4f86\u76e3\u63a7\uff0c\u4f8b\u5982\uff1a<\/p>\n
\nwatch: {\n  propA(newVal) {\n    \/\/ \u8655\u7406 propA \u7684\u8b8a\u5316\n  },\n  propB(newVal) {\n    \/\/ \u8655\u7406 propB \u7684\u8b8a\u5316\n  }\n}\n<\/code><\/pre>\n
3. \u5982\u4f55\u907f\u514d\u904e\u591a\u7684\u76e3\u63a7\u5f15\u8d77\u6027\u80fd\u554f\u984c\uff1f<\/h3>\n
\u53ef\u4ee5\u4f7f\u7528\u9632\u6296\uff08debounce\uff09\u6216\u7bc0\u6d41\uff08throttle\uff09\u7684\u6280\u8853\u4f86\u9650\u5236\u51fd\u5f0f\u57f7\u884c\u7684\u983b\u7387\uff0c\u5f9e\u800c\u63d0\u5347\u6027\u80fd\u3002
\n—<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6587\u7ae0\u6458\u8981\uff1a\u672c\u6587\u5c07\u4ecb\u7d39Vue.js\u4e2d\u7684\u7d44\u4ef6\u4fa6\u542c\u5668(watch)\uff0c\u8a73\u7d30\u89e3\u91cb\u5982\u4f55\u4f7f\u7528\u5b83\u4f86\u76e3\u63a7\u6578\u64da\u7684\u8b8a\u5316\uff0c\u4ee5\u53ca\u5982\u4f55\u5229\u7528\u5b83\u4f86\u57f7\u884c\u7279\u5b9a\u7684\u64cd\u4f5c\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[180,179],"tags":[178,177],"class_list":["post-4355","post","type-post","status-publish","format-standard","hentry","category-vue","category-vue-js","tag-vue","tag-vue-js"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-18f","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4355","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=4355"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4355\/revisions"}],"predecessor-version":[{"id":4356,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/4355\/revisions\/4356"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=4355"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=4355"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=4355"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}