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JavaScript Vue.js Basics Sweeping Vues: Loops, Methods, Directives Getting Loopier

Why do we have to use a Parameters in the function?

When using v-for to loop through an array of objects why do i have to add a parameter to the method to let the method know which item in the loop we are targeting? Why wont this work in the function?i.e.this.media.showDetail = !this.media.showDetail?

1 Answer

I had the same question for a moment,

this.media.showDetail = !this.media.showDetail would not work because "this" would reference to the "app" object and its data which has two data parameters - "title" and "mediaList". So this keyword can only be used to update "this.title" and "this.mediaList".

Since mediaList is an array of "media" objects, the "toggleDetails" method needs to know which one to update - so this is why parameter is required.