javascript - How does the WeChat applet monitor and execute a function when certain data are all true?-PHP Chinese Network Q&A

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javascript - How does the WeChat applet monitor and execute a function when certain data are all true?

黄舟 2017-05-18 11:03:13

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For example, these values will change, and the function inside needs to be triggered when these values are true. So where is this code written? Can these values be monitored in real time? I previously found that the function inside was not executed because I wrote this code in onload. Now it seems that it is not working. Does anyone have any good ideas?

黄舟

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曾经蜡笔没有小新2017-05-18 11:05:13 2 floor

You can monitor the corresponding events through the getter and setter of JS Object

var obj = { val: 100, get getval() { console.log('访问了getVal的值'); return this.val; }, set setval(x) { console.log('设置getVal的值'); this.val = x; } } // 在访问 obj.getval时，将会看到 ‘访问了getVal的值’ // 在设置 obj.setval=1000时，会看到 ‘设置getVal的值’