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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | 84x 84x 84x 84x 84x 202x 202x 202x 2x 2x 200x 8x 202x 3x 2x 1x 1x 1x 1x 202x 150x 5x 150x 1x 202x 2x 2x 200x 84x 6x 5x 4x 1x 1x 1x | import { DirectiveTransform } from '../transform'
import {
createObjectProperty,
createSimpleExpression,
ExpressionNode,
NodeTypes
} from '../ast'
import { createCompilerError, ErrorCodes } from '../errors'
import { camelize } from '@vue/shared'
import { CAMELIZE } from '../runtimeHelpers'
// v-bind without arg is handled directly in ./transformElements.ts due to it affecting
// codegen for the entire props object. This transform here is only for v-bind
// *with* args.
export const transformBind: DirectiveTransform = (dir, _node, context) => {
const { exp, modifiers, loc } = dir
const arg = dir.arg!
if (arg.type !== NodeTypes.SIMPLE_EXPRESSION) {
arg.children.unshift(`(`)
arg.children.push(`) || ""`)
} else if (!arg.isStatic) {
arg.content = `${arg.content} || ""`
}
// .sync is replaced by v-model:arg
if (modifiers.includes('camel')) {
if (arg.type === NodeTypes.SIMPLE_EXPRESSION) {
if (arg.isStatic) {
arg.content = camelize(arg.content)
} else {
arg.content = `${context.helperString(CAMELIZE)}(${arg.content})`
}
} else {
arg.children.unshift(`${context.helperString(CAMELIZE)}(`)
arg.children.push(`)`)
}
}
if (!context.inSSR) {
if (modifiers.includes('prop')) {
injectPrefix(arg, '.')
}
if (modifiers.includes('attr')) {
injectPrefix(arg, '^')
}
}
if (
!exp ||
(exp.type === NodeTypes.SIMPLE_EXPRESSION && !exp.content.trim())
) {
context.onError(createCompilerError(ErrorCodes.X_V_BIND_NO_EXPRESSION, loc))
return {
props: [createObjectProperty(arg, createSimpleExpression('', true, loc))]
}
}
return {
props: [createObjectProperty(arg, exp)]
}
}
const injectPrefix = (arg: ExpressionNode, prefix: string) => {
if (arg.type === NodeTypes.SIMPLE_EXPRESSION) {
if (arg.isStatic) {
arg.content = prefix + arg.content
} else {
arg.content = `\`${prefix}\${${arg.content}}\``
}
} else {
arg.children.unshift(`'${prefix}' + (`)
arg.children.push(`)`)
}
}
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