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Diffstat (limited to 'node_modules/react-dom/lib/setInnerHTML.js')
| -rw-r--r-- | node_modules/react-dom/lib/setInnerHTML.js | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/node_modules/react-dom/lib/setInnerHTML.js b/node_modules/react-dom/lib/setInnerHTML.js new file mode 100644 index 000000000..6c5f3d301 --- /dev/null +++ b/node_modules/react-dom/lib/setInnerHTML.js @@ -0,0 +1,97 @@ +/** + * Copyright 2013-present, Facebook, Inc. + * All rights reserved. + * + * This source code is licensed under the BSD-style license found in the + * LICENSE file in the root directory of this source tree. An additional grant + * of patent rights can be found in the PATENTS file in the same directory. + * + */ + +'use strict'; + +var ExecutionEnvironment = require('fbjs/lib/ExecutionEnvironment'); +var DOMNamespaces = require('./DOMNamespaces'); + +var WHITESPACE_TEST = /^[ \r\n\t\f]/; +var NONVISIBLE_TEST = /<(!--|link|noscript|meta|script|style)[ \r\n\t\f\/>]/; + +var createMicrosoftUnsafeLocalFunction = require('./createMicrosoftUnsafeLocalFunction'); + +// SVG temp container for IE lacking innerHTML +var reusableSVGContainer; + +/** + * Set the innerHTML property of a node, ensuring that whitespace is preserved + * even in IE8. + * + * @param {DOMElement} node + * @param {string} html + * @internal + */ +var setInnerHTML = createMicrosoftUnsafeLocalFunction(function (node, html) { + // IE does not have innerHTML for SVG nodes, so instead we inject the + // new markup in a temp node and then move the child nodes across into + // the target node + if (node.namespaceURI === DOMNamespaces.svg && !('innerHTML' in node)) { + reusableSVGContainer = reusableSVGContainer || document.createElement('div'); + reusableSVGContainer.innerHTML = '<svg>' + html + '</svg>'; + var svgNode = reusableSVGContainer.firstChild; + while (svgNode.firstChild) { + node.appendChild(svgNode.firstChild); + } + } else { + node.innerHTML = html; + } +}); + +if (ExecutionEnvironment.canUseDOM) { + // IE8: When updating a just created node with innerHTML only leading + // whitespace is removed. When updating an existing node with innerHTML + // whitespace in root TextNodes is also collapsed. + // @see quirksmode.org/bugreports/archives/2004/11/innerhtml_and_t.html + + // Feature detection; only IE8 is known to behave improperly like this. + var testElement = document.createElement('div'); + testElement.innerHTML = ' '; + if (testElement.innerHTML === '') { + setInnerHTML = function (node, html) { + // Magic theory: IE8 supposedly differentiates between added and updated + // nodes when processing innerHTML, innerHTML on updated nodes suffers + // from worse whitespace behavior. Re-adding a node like this triggers + // the initial and more favorable whitespace behavior. + // TODO: What to do on a detached node? + if (node.parentNode) { + node.parentNode.replaceChild(node, node); + } + + // We also implement a workaround for non-visible tags disappearing into + // thin air on IE8, this only happens if there is no visible text + // in-front of the non-visible tags. Piggyback on the whitespace fix + // and simply check if any non-visible tags appear in the source. + if (WHITESPACE_TEST.test(html) || html[0] === '<' && NONVISIBLE_TEST.test(html)) { + // Recover leading whitespace by temporarily prepending any character. + // \uFEFF has the potential advantage of being zero-width/invisible. + // UglifyJS drops U+FEFF chars when parsing, so use String.fromCharCode + // in hopes that this is preserved even if "\uFEFF" is transformed to + // the actual Unicode character (by Babel, for example). + // https://github.com/mishoo/UglifyJS2/blob/v2.4.20/lib/parse.js#L216 + node.innerHTML = String.fromCharCode(0xFEFF) + html; + + // deleteData leaves an empty `TextNode` which offsets the index of all + // children. Definitely want to avoid this. + var textNode = node.firstChild; + if (textNode.data.length === 1) { + node.removeChild(textNode); + } else { + textNode.deleteData(0, 1); + } + } else { + node.innerHTML = html; + } + }; + } + testElement = null; +} + +module.exports = setInnerHTML;
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