オプションについてはなぜかちょっと遠いところで、APIの中に記載があります。 [vueのドキュメントの説明]https://jp.vuejs.org/v2/api/index.html#vm-watch deep 通常、objectのプロパティの変更は、watchが発火しません。 data: () => ({ someObject: {}, )}, watch: { someObject(newVal, oldVal) { console.log(newVal); }, } methods: { onClick: function() { // watchが発火しない! someObject.hoge = 'hoge'; }, data: () => ({ someObject: {}, )}, watch: { someObject: { deep: true, handler(newV
![わかりにくいvue.jsのwatch(ウォッチャ)のオプションを使った書き方 - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/0bd0d11da9b8154c39d2e2043c91bf5330922ed5/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-412672c5f0600ab9a64263b751f1bc81.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-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%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDBtb3lhc2hpZGFpc3VrZSZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTM2JnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9YjllNWM0ZjRhYTY1MzdlNGNkZmI3NTE4ZDQ2ZDNmNzY%26blend-x%3D142%26blend-y%3D436%26blend-mode%3Dnormal%26txt64%3DaW4g44Ko44Oz44K444OL44Ki44Go5Lq655Sf44Kz44Of44Ol44OL44OG44Kj%26txt-width%3D770%26txt-clip%3Dend%252Cellipsis%26txt-color%3D%2523212121%26txt-font%3DHiragino%2520Sans%2520W6%26txt-size%3D36%26txt-x%3D156%26txt-y%3D536%26s%3D2a9b7ca1d741adc6b3e97e3024831c44)