no elseBlock in vue-template-compiler 2.1.3

[mlinquan]

Vue.js version(vue-template-compiler)

2.1.3

Code

var compiler = require('vue-template-compiler')
console.log(compiler.compile('<span v-if="abc">abc</span><span v-else>bcd</span>'));

Result

2.0.8 (has elseBlock)

{ ast:
   { type: 1,
     tag: 'span',
     attrsList: [],
     attrsMap: { 'v-if': 'abc' },
     parent: undefined,
     children: [ [Object] ],
     if: 'abc',
     plain: true,
     elseBlock://<--has elseBlock
      { type: 1,
        tag: 'span',
        attrsList: [],
        attrsMap: [Object],
        parent: undefined,
        children: [Object],
        else: true,
        plain: true },
     static: false,
     staticRoot: false,
     ifProcessed: true },
  render: 'with(this){return (abc)?_h(\'span\',["abc"]):_h(\'span\',["bcd"])}',
  staticRenderFns: [],
  errors: [] }

2.1.3 (no elseBlock)

{ ast:
   { type: 1,
     tag: 'span',
     attrsList: [],
     attrsMap: { 'v-if': 'abc' },
     parent: undefined,
     children: [ [Object] ],
     if: 'abc',
     conditions: [],
     plain: true,
     static: false,
     staticRoot: false,
     ifProcessed: true },
  render: 'with(this){return (abc)?_h(\'span\',["abc"]):_h(\'span\',["bcd"])}',
  staticRenderFns: [],
  errors: [] }

What is Expected?

Always able to compile 'elseBlock'.

What is actually happening?

I don't know.

[yyx990803]

In 2.1.0 all condition branches for v-if/v-else/v-else-if are moved in to the node.conditions array. However the codegen mutated the array while generating the branches so it ended up empty.

I've renamed it to node.ifConditions and avoided the mutation.

/cc @defcc : in the future, we should avoid mutating the AST during codegen.

[defcc]

Ok, got it.