40 lines
842 B
HTML
40 lines
842 B
HTML
<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<script src="../js/vue@2.7.16.js"></script>
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<title>监视属性</title>
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</head>
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<body>
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<div id="app">
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<h2>天气很什么：{{isHot}}</h2>
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<button @click="changeWeather">切换天气</button>
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</div>
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</body>
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<script>
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const vm = new Vue({
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el: "#app",
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data: {
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isHot: true
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},
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methods: {
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changeWeather() {
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this.isHot = !this.isHot
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}
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},
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watch: {
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immediate: true,
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isHot: {
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handler(newVal, oldVal) {
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console.log("值修改", newVal, oldVal);
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}
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}
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}
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})
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</script>
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</html> |