There are several values ​​of bind variables in Vue and methods to prevent them from changing (detailed tutorial)

Now I will share with you an article about the values ​​​​of several binding variables in Vue and the methods to prevent them from changing. It has a good reference value and I hope it will be helpful to everyone.

1. Object.freeze(obj) statement

obj={ 
 foo:"nan" 
} 
Object.freeze(obj);

After using this statement to fix a variable, subsequent changes to this variable will be invalid. and report an error in the console.

2. v-once element binding

<span>{{msg}}</span>

When the msg data changes, the span content will also change immediately, but if

<span v-once>{{msg}}</span>

If v-once binding is added, even if the msg in the data changes, the content in the span will not change accordingly. But this does not prevent data from changing, but only binds an html element so that it does not change.

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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