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/* @flow */
import { parseText } from 'compiler/parser/text-parser'
import {
getAndRemoveAttr,
getBindingAttr,
baseWarn
} from 'compiler/helpers'
function transformNode (el: ASTElement, options: CompilerOptions) {
const warn = options.warn || baseWarn
const staticClass = getAndRemoveAttr(el, 'class')
if (process.env.NODE_ENV !== 'production' && staticClass) {
const res = parseText(staticClass, options.delimiters)
if (res) {
warn(
`class="${staticClass}": ` +
'Interpolation inside attributes has been removed. ' +
'Use v-bind or the colon shorthand instead. For example, ' +
'instead of <div class="{{ val }}">, use <div :class="val">.'
)
}
}
if (staticClass) {
el.staticClass = JSON.stringify(staticClass)
}
const classBinding = getBindingAttr(el, 'class', false /* getStatic */)
if (classBinding) {
el.classBinding = classBinding
}
}
function genData (el: ASTElement): string {
let data = ''
if (el.staticClass) {
data += `staticClass:${el.staticClass},`
}
if (el.classBinding) {
data += `class:${el.classBinding},`
}
return data
}
export default {
staticKeys: ['staticClass'],
transformNode,
genData
}
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