61 lines
1.5 KiB
HTML
61 lines
1.5 KiB
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 http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>vue生命周期</title>
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</head>
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<body>
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<div class="app">
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<h2 ref="test">{{ test }}</h2>
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</div>
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</body>
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<script src="https://cdn.jsdelivr.net/npm/vue@2.6.14"></script>
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<script>
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// TODO activated 需要说明
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var vm = new Vue({
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el: '.app',
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data: {
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test: '你好'
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},
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// 发送ajax请求
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created() {
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console.log(this.$refs.test);
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// console.log(document.querySelector("h2"));
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},
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// 也可以发送ajax请求
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mounted() {
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this.getTest
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console.log(this.getHello);
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console.log(this.$refs.test);
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},
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updated() {
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console.log("数据更新了");
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},
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methods: {
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getTest() {
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console.log("getTest");
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}
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},
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// computed 写法上和 methods 是一样的，
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// 会做缓存
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computed: {
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getHello() {
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console.log("getHello");
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return 1
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}
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},
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// 使用watch 监听数据的修改，触发一些其他操作
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watch: {
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test(newVal, oldVal) {
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console.log("newVal: ", newVal);
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console.log("oldVal: ", oldVal);
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}
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}
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});
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</script>
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</html> |