default.beforeMount() — vue Function Reference

Architecture documentation for the default.beforeMount() function in transition-group.ts from the vue codebase.

Function typescript WebPlatform RuntimeDirectives calls 1

Entity Profile

WebPlatform→ RuntimeDirectives→ default.beforeMount() — vue Function Reference

Dependency Diagram

graph TD
  aa442434_1255_86cc_0160_e67d101bb1df["default.beforeMount()"]
  dc2699e8_e9c4_3f79_1c12_30d06eb6e4ef["setActiveInstance()"]
  aa442434_1255_86cc_0160_e67d101bb1df -->|calls| dc2699e8_e9c4_3f79_1c12_30d06eb6e4ef
  style aa442434_1255_86cc_0160_e67d101bb1df fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

src/platforms/web/runtime/components/transition-group.ts lines 41–56

  beforeMount() {
    const update = this._update
    this._update = (vnode, hydrating) => {
      const restoreActiveInstance = setActiveInstance(this)
      // force removing pass
      this.__patch__(
        this._vnode,
        this.kept,
        false, // hydrating
        true // removeOnly (!important, avoids unnecessary moves)
      )
      this._vnode = this.kept
      restoreActiveInstance()
      update.call(this, vnode, hydrating)
    }
  },