vue watch可以侦听localstorage

在Vue中，可以使用watch来侦听localStorage的变化。通过在watch配置项中设置被侦听的属性名为localStorage的键名，当localStorage中对应的值发生变化时，watch函数会被触发。例如，可以创建一个名为todos的localStorage键，然后使用watch来侦听它的变化。在watch函数中，可以获取到新值和旧值，以进行相应的处理。
示例代码如下：

watch: {
  'localStorage.todos'(newVal, oldVal) {
    // 处理localStorage.todos的变化
  }
}

在上述代码中，使用了字符串模板的方式来指定被侦听的属性名为localStorage.todos，当localStorage中的todos发生变化时，watch函数会被调用，并且可以通过newVal和oldVal获取到新值和旧值。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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