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refactor: remove unnecessary checks #7875

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merged 2 commits into from
Mar 22, 2018
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HcySunYang
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What kind of change does this PR introduce? (check at least one)

  • Bugfix
  • Feature
  • Code style update
  • Refactor
  • Build-related changes
  • Other, please describe:

Does this PR introduce a breaking change? (check one)

  • Yes
  • No

If yes, please describe the impact and migration path for existing applications:

The PR fulfills these requirements:

If adding a new feature, the PR's description includes:

  • A convincing reason for adding this feature (to avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it)

Other information:
Through the processing of the mergeOptions function, the type of vm.$options.data is either a function or undefined. And in the initState function has filtered out the possibility of undefined, so in the initData function vm.$options.data must be a function

@yyx990803 yyx990803 merged commit 43551b4 into vuejs:dev Mar 22, 2018
yyx990803 added a commit that referenced this pull request Mar 22, 2018
@jo0ger
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jo0ger commented Jun 26, 2018

Hi, I think these checks are necessary.
For example:

const app = new Vue({
    el: '#app',
    data: {
        name: 'Jooger'
    },
    beforeCreate () {
        this.$options.data = {
            name: 'Jooger2'
        }
    }
})

Because beforeCreate is executed before initData, it is necessary to check the data type in initData if I change vm.$option.data in beforeCreate

@posva
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posva commented Jun 26, 2018

@jo0ger They were reverted

f2009 pushed a commit to f2009/vue that referenced this pull request Jan 25, 2019
f2009 pushed a commit to f2009/vue that referenced this pull request Jan 25, 2019
aJean pushed a commit to aJean/vue that referenced this pull request Aug 19, 2020
aJean pushed a commit to aJean/vue that referenced this pull request Aug 19, 2020
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4 participants