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October 7, 2018 08:00
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Computed vs Watched Property
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license: mit |
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<!DOCTYPE html> | |
<head> | |
<meta charset="utf-8"> | |
<script src="https://d3js.org/d3.v4.min.js"></script> | |
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> | |
<style> | |
body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; } | |
</style> | |
</head> | |
<div id="demo">{{ fullName }}</div> | |
<body> | |
<script> | |
var vm = new Vue({ | |
el: '#demo', | |
data: { | |
firstName: 'Foo', | |
lastName: 'Bar', | |
fullName: 'Foo Bar' | |
}, | |
watch: { | |
firstName: function (val) { | |
this.fullName = val + ' ' + this.lastName | |
}, | |
lastName: function (val) { | |
this.fullName = this.firstName + ' ' + val | |
} | |
} | |
}) | |
</script> | |
</body> |
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