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[vue] 在vue中使用this应该注意哪些问题？ #443

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haizhilin2013 opened this issue Jun 22, 2019 · 5 comments
Open

[vue] 在vue中使用this应该注意哪些问题？ #443

haizhilin2013 opened this issue Jun 22, 2019 · 5 comments
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@haizhilin2013
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[vue] 在vue中使用this应该注意哪些问题？
@haizhilin2013 haizhilin2013 added the vue vue label Jun 22, 2019
@maozhuo123
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vue中使用匿名函数，会出现this指针改变。
解决方法
1.使用箭头函数
2.定义变量绑定this至vue对象

@xindiyang
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vue 的data避免使用箭头函数

@ZoeQCJ
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ZoeQCJ commented Sep 27, 2019

vue中methods中函数尽量不要使用箭头函数，会改变this指向，在vue-cli构建的项目中this会为undefined

@hwyeee
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hwyeee commented May 7, 2020

生命周期的钩子函数不能使用箭头函数，否者this不能指向vue实例

@hyj443
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hyj443 commented Oct 27, 2021

凡是vue里你写的函数中this能拿到当前组件实例的地方，都是vue在内部通过call改绑到vm实例的，但你换成箭头函数，它里面的this是无法改绑的，只继承上级的this

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@haizhilin2013 @maozhuo123 @xindiyang @hyj443 @ZoeQCJ @hwyeee