I am using vuejs.

this.$slots.eventsContent?.[0]?.data = {};

I got error from IDE.

TS2779: The left-hand side of an assignment expression may not be an optional property access.

Do you know how to get rid of error?

CodePudding user response：

Do not use optional property.

this.$slots.eventsContent[0].data = {}; 

If you get "property maybe undefined error" you can do like this:

if (this.$slots.eventsContent && $slots.eventsContent.length > 0) {
    this.$slots.eventsContent[0].data = {}; 
} 

Just check if the property is not undefined before doing anything. This way typescript will be sure that your variable is defined.

CodePudding user response：

You cannot assign to a property of something that is possibly undefined. If you are sure that these are not undefined, you can use this.$slots.eventsContent!.[0]!.data = {} to ignore it, or if you only want to assign it only if the values are defined then you need nested ifs to check undefined