es5-lit-html/lib/render.js

An ES5 transpiled version of lit-html

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.render = exports.parts = void 0;

var _dom = require("./dom.js");

var _parts = require("./parts.js");

var _templateFactory = require("./template-factory.js");

/**
 * @license
 * Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at
 * http://polymer.github.io/LICENSE.txt
 * The complete set of authors may be found at
 * http://polymer.github.io/AUTHORS.txt
 * The complete set of contributors may be found at
 * http://polymer.github.io/CONTRIBUTORS.txt
 * Code distributed by Google as part of the polymer project is also
 * subject to an additional IP rights grant found at
 * http://polymer.github.io/PATENTS.txt
 */

/**
 * @module lit-html
 */
var parts = new WeakMap();
/**
 * Renders a template result or other value to a container.
 *
 * To update a container with new values, reevaluate the template literal and
 * call `render` with the new result.
 *
 * @param result Any value renderable by NodePart - typically a TemplateResult
 *     created by evaluating a template tag like `html` or `svg`.
 * @param container A DOM parent to render to. The entire contents are either
 *     replaced, or efficiently updated if the same result type was previous
 *     rendered there.
 * @param options RenderOptions for the entire render tree rendered to this
 *     container. Render options must *not* change between renders to the same
 *     container, as those changes will not effect previously rendered DOM.
 */

exports.parts = parts;

var render = function render(result, container, options) {
  var part = parts.get(container);

  if (part === undefined) {
    (0, _dom.removeNodes)(container, container.firstChild);
    parts.set(container, part = new _parts.NodePart(Object.assign({
      templateFactory: _templateFactory.templateFactory
    }, options)));
    part.appendInto(container);
  }

  part.setValue(result);
  part.commit();
};

exports.render = render;