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Add undefined check for instance methods #3656

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merged 3 commits into from
Sep 11, 2016
Merged

Add undefined check for instance methods #3656

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622e87c
add undefined check for instance methods
itsMapleLeaf Sep 10, 2016
3cb17d4
added a warning for undefined methods
itsMapleLeaf Sep 10, 2016
236fdc3
add production ENV check
itsMapleLeaf Sep 11, 2016
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6 changes: 5 additions & 1 deletion src/core/instance/state.js
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Original file line number Diff line number Diff line change
Expand Up @@ -142,7 +142,11 @@ function initMethods (vm: Component) {
const methods = vm.$options.methods
if (methods) {
for (const key in methods) {
vm[key] = bind(methods[key], vm)
if (methods[key] != null) {
vm[key] = bind(methods[key], vm)
} else if (process.env.NODE_ENV !== 'production') {
warn(`The method ${key} on vue instance is undefined.`, vm)
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can we add else if (process.env.NODE_ENV !== 'production') here so that the warning can be stripped?

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Done!

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curious why do you provide vm as a second variable? it will log vm?

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it's used to get the component name, if available:

https://github.com/vuejs/vue/blob/dev/src/core/util/debug.js#L10-L13

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Ahh I get it, You saved me!!!!!!!!!!

}
}
}
}
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