error-detector.ts — vue Source File

Source Code

import { ASTElement, ASTNode } from 'types/compiler'
import { dirRE, onRE } from './parser/index'

type Range = { start?: number; end?: number }

// these keywords should not appear inside expressions, but operators like
// typeof, instanceof and in are allowed
const prohibitedKeywordRE = new RegExp(
  '\\b' +
    (
      'do,if,for,let,new,try,var,case,else,with,await,break,catch,class,const,' +
      'super,throw,while,yield,delete,export,import,return,switch,default,' +
      'extends,finally,continue,debugger,function,arguments'
    )
      .split(',')
      .join('\\b|\\b') +
    '\\b'
)

// these unary operators should not be used as property/method names
const unaryOperatorsRE = new RegExp(
  '\\b' +
    'delete,typeof,void'.split(',').join('\\s*\\([^\\)]*\\)|\\b') +
    '\\s*\\([^\\)]*\\)'
)

// strip strings in expressions
const stripStringRE =
  /'(?:[^'\\]|\\.)*'|"(?:[^"\\]|\\.)*"|`(?:[^`\\]|\\.)*\$\{|\}(?:[^`\\]|\\.)*`|`(?:[^`\\]|\\.)*`/g

// detect problematic expressions in a template
export function detectErrors(ast: ASTNode | undefined, warn: Function) {
  if (ast) {
    checkNode(ast, warn)
  }
}

function checkNode(node: ASTNode, warn: Function) {
  if (node.type === 1) {
    for (const name in node.attrsMap) {
      if (dirRE.test(name)) {
        const value = node.attrsMap[name]
        if (value) {
          const range = node.rawAttrsMap[name]
          if (name === 'v-for') {
            checkFor(node, `v-for="${value}"`, warn, range)
          } else if (name === 'v-slot' || name[0] === '#') {
            checkFunctionParameterExpression(
              value,
              `${name}="${value}"`,
              warn,
              range
            )
          } else if (onRE.test(name)) {
            checkEvent(value, `${name}="${value}"`, warn, range)
          } else {
            checkExpression(value, `${name}="${value}"`, warn, range)
          }
        }
      }
// ... (99 more lines)