uniapp 小程序 启动报错 （不支持的语法）

错误堆栈没有自己写的文件 ，估计是template编译时错误

注

1. Q$：出现的问题
2. A$：问题原因
3. 建议检索的正则：方案\d*

Q1: TypeError: Property value expected type of string but got null

TypeError: Property value expected type of string but got null
    at Object.validate (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\types\lib\definitions\utils.js:160:13)
    at validateField (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\types\lib\validators\validate.js:24:9)
    at validate (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\types\lib\validators\validate.js:17:3)
    at builder (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\types\lib\builders\builder.js:38:27)
    at Object.StringLiteral (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\types\lib\builders\generated\index.js:350:31)
    at D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\class.js:58:11
    at Array.forEach (<anonymous>)
    at processClassObjectExpression (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\class.js:53:17)
    at processClass (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\class.js:84:11)
    at D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\index.js:34:5
    at Array.forEach (<anonymous>)
    at traverseData (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\index.js:33:13)
    at Object.CallExpression (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\visitor.js:186:58)
    at NodePath._call (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\traverse\lib\path\context.js:55:20)
    at NodePath.call (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\traverse\lib\path\context.js:42:17)
    at NodePath.visit (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\traverse\lib\path\context.js:90:31)
Module build failed (from ./node_modules/@dcloudio/vue-cli-plugin-uni/packages/vue-loader/lib/loaders/templateLoader.js):
Error: Compile failed at common/components/Button/index.vue
    at compile (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\index.js:140:13)
    at actuallyCompile (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-uni\packages\@vue\component-compiler-utils\dist\compileTemplate.js:70:96)
    at compileTemplate (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-uni\packages\@vue\component-compiler-utils\dist\compileTemplate.js:31:16)
    at Object.<anonymous> (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-uni\packages\vue-loader\lib\loaders\templateLoader.js:46:20)

A1: template中不支持对象属性模板字符串

<view
	:class="{
		plain,disabled,
		[`theme-${theme}`]:theme,
		[`prefix-${prefix}`]:prefix,
		[`suffix-${prefix}`]:suffix,
	}"
>

方案：将class改为了一个computed：:class="computedClass"

Q2 TypeError: Cannot read property ‘name’ of undefined

TypeError: Cannot read property 'name' of undefined
    at D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\style.js:86:41
    at Array.forEach (<anonymous>)
    at processStyleObjectExpression (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\style.js:79:17)
    at processStyle (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\style.js:128:11)
    at D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\index.js:34:5
    at Array.forEach (<anonymous>)
    at traverseData (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\data\index.js:33:13)
    at Object.CallExpression (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\script\traverse\visitor.js:186:58)
    at NodePath._call (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\traverse\lib\path\context.js:55:20)
    at NodePath.call (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\traverse\lib\path\context.js:42:17)
    at NodePath.visit (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\traverse\lib\path\context.js:90:31)
    at TraversalContext.visitQueue (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\traverse\lib\context.js:112:16)
    at TraversalContext.visitSingle (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\traverse\lib\context.js:84:19)
    at TraversalContext.visit (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\traverse\lib\context.js:140:19)
    at Function.traverse.node (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\traverse\lib\index.js:84:17)
    at NodePath.visit (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@babel\traverse\lib\path\context.js:97:18)
Module build failed (from ./node_modules/@dcloudio/vue-cli-plugin-uni/packages/vue-loader/lib/loaders/templateLoader.js):
Error: Compile failed at common/components/_Project/Code/CodeInput.vue
    at compile (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\uni-template-compiler\lib\index.js:140:13)
    at actuallyCompile (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-uni\packages\@vue\component-compiler-utils\dist\compileTemplate.js:70:96)
    at compileTemplate (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-uni\packages\@vue\component-compiler-utils\dist\compileTemplate.js:31:16)
    at Object.<anonymous> (D:\pro\HBuilderX\plugins\uniapp-cli\node_modules\@dcloudio\vue-cli-plugin-uni\packages\vue-loader\lib\loaders\templateLoader.js:46:20)

A2: template中不支持对象展开运算

<view v-for="num in maxlength" :key="num" class="item" :class="{'item-active':num<=valueLength+1}"
	:style="{
		width,height,marginRight:num===maxlength?0:split,
		...((num<=valueLength+1)?activeItemStyle:itemStyle),
	}"
>...</view>

方案：在组件外部使用类名改变样式（不支持函数传参，不支持展开对象，不会了orz）