all files / liquidjs/tags/ increment.js

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const Liquid = require('..')
const assert = require('../src/util/assert.js')
const lexical = Liquid.lexical
 
module.exports = function (liquid) {
  liquid.registerTag('increment', {
    parse: function (token) {
      var match = token.args.match(lexical.identifier)
      assert(match, `illegal identifier ${token.args}`)
      this.variable = match[0]
    },
    render: function (scope, hash) {
      var v = scope.get(this.variable)
      if (typeof v !== 'number') v = 0
      scope.set(this.variable, v + 1)
    }
  })
}