genDefaultModel() — vue Function Reference

Architecture documentation for the genDefaultModel() function in model.ts from the vue codebase.

Function typescript WebPlatform WebCompiler called by 1

Entity Profile

WebPlatform→ WebCompiler→ genDefaultModel() — vue Function Reference

Dependency Diagram

graph TD
  811f9f99_b9dc_79e8_ddcc_7bc64cf6b8f6["genDefaultModel()"]
  15390ccf_ab46_d508_a1ed_b3b87cc03914["model.ts"]
  811f9f99_b9dc_79e8_ddcc_7bc64cf6b8f6 -->|defined in| 15390ccf_ab46_d508_a1ed_b3b87cc03914
  d13f0020_9aae_98ba_33de_e0cf5575ddfd["model()"]
  d13f0020_9aae_98ba_33de_e0cf5575ddfd -->|calls| 811f9f99_b9dc_79e8_ddcc_7bc64cf6b8f6
  style 811f9f99_b9dc_79e8_ddcc_7bc64cf6b8f6 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

src/platforms/web/compiler/directives/model.ts lines 137–181

function genDefaultModel(
  el: ASTElement,
  value: string,
  modifiers?: ASTModifiers | null
): boolean | void {
  const type = el.attrsMap.type

  // warn if v-bind:value conflicts with v-model
  // except for inputs with v-bind:type
  if (__DEV__) {
    const value = el.attrsMap['v-bind:value'] || el.attrsMap[':value']
    const typeBinding = el.attrsMap['v-bind:type'] || el.attrsMap[':type']
    if (value && !typeBinding) {
      const binding = el.attrsMap['v-bind:value'] ? 'v-bind:value' : ':value'
      warn(
        `${binding}="${value}" conflicts with v-model on the same element ` +
          'because the latter already expands to a value binding internally',
        el.rawAttrsMap[binding]
      )
    }
  }

  const { lazy, number, trim } = modifiers || {}
  const needCompositionGuard = !lazy && type !== 'range'
  const event = lazy ? 'change' : type === 'range' ? RANGE_TOKEN : 'input'

  let valueExpression = '$event.target.value'
  if (trim) {
    valueExpression = `$event.target.value.trim()`
  }
  if (number) {
    valueExpression = `_n(${valueExpression})`
  }

  let code = genAssignmentCode(value, valueExpression)
  if (needCompositionGuard) {
    code = `if($event.target.composing)return;${code}`
  }

  addProp(el, 'value', `(${value})`)
  addHandler(el, event, code, null, true)
  if (trim || number) {
    addHandler(el, 'blur', '$forceUpdate()')
  }
}