1. (obj) statement
obj={
foo:"nan"
}
(obj);
After using this statement to fix the variable, the subsequent changes to this variable will be invalid and an error will be reported in the console.
2. V-once element binding
<span>{{msg}}</span>
When the msg data is changed, the content of the span will also change immediately, but if
<span v-once>{{msg}}</span>
If v-once binding is added, even if msg in the data changes the content in the span, it will not change accordingly. But this is not to prevent data from changing, but just binds an html element to prevent it from changing
The above article briefly talks about the values of several binding variables in vue. The way to prevent them from changing is all the content I share with you. I hope you can give you a reference and I hope you can support me more.