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How to deal with the problem that the selected value does not change after changing the calculated attribute in VUE
How to deal with the problem that the selected value does not change after changing the calculated attribute in VUE
This time I will bring you how to handle the select value that does not change after changing the calculated attribute in VUE. Note that the selected value does not change after changing the calculated attribute in VUE. What are the matters? Below are practical cases. Let’s take a look.
First enter the code:
//...
<body>
<p id="qwe">
<select v-model="selected">
<option v-for="item in da" :value="item.value">{{item.value}}</option>
</select>
<span>{{selected}}</span>
</p>
<script>
var dt = [{
value: '111',
label: 'aaa'
}, {
value: '222',
label: 'bbb'
}, {
value: '333',
label: 'ccc'
}, {
value: '444',
label: 'ddd'
}, {
value: '555',
label: 'fff'
}];
var vm = new Vue({
el: '#qwe',
data: {
options: [{
value: '选项1',
label: '黄金糕'
}, {
value: '选项2',
label: '双皮奶'
}, {
value: '选项3',
label: '蚵仔煎'
}, {
value: '选项4',
label: '龙须面'
}, {
value: '选项5',
label: '北京烤鸭'
}],
selected: ''
},
computed: {
da: function () {
var _self = this;
return _self.options.filter(function (item) {
return +item.value.split('')[2] > 2;
});
}
}
})
</script>
</body>
</html>been updated , but the selected attribute has not been updated synchronously because it caches the last selected value.
I don’t know if the design here is reasonable, because I rarely use it this way. But if there are problems, they must be solved. Addselected='' to the calculated attribute in computed, and reset the selected attribute every time the dependency is updated.
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website! Recommended reading:How to use Vue’s carousel component
The above is the detailed content of How to deal with the problem that the selected value does not change after changing the calculated attribute in VUE. For more information, please follow other related articles on the PHP Chinese website!
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