Function removeVariableDeclarator

packages/nuxt/src/components/plugins/tree-shake.ts:234–248

* remove a variable declaration within the code

(codeAst: Program, name: string, magicString: MagicString, removedNodes: WeakSet<Node>)

 * remove a variable declaration within the code
 */
function removeVariableDeclarator (codeAst: Program, name: string, magicString: MagicString, removedNodes: WeakSet<Node>): Node | void {
  // remove variables
  walk(codeAst, {
    enter (node) {
      if (node.type !== 'VariableDeclaration') { return }
      for (const declarator of node.declarations) {
        const toRemove = findMatchingPatternToRemove(declarator.id, node, name, removedNodes)
        if (toRemove) {
          magicString.remove(toRemove.start, toRemove.end + 1)
          removedNodes.add(toRemove)
        }
      }
    },
  })
}

/**
 * find the Pattern to remove which the identifier is equal to the name parameter.