react app

react-app/node_modules/react/lib/CSSPropertyOperations.js

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+/**
+ * Copyright 2013-2015, 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.
+ *
+ * @providesModule CSSPropertyOperations
+ * @typechecks static-only
+ */
+
+'use strict';
+
+var CSSProperty = require("./CSSProperty");
+var ExecutionEnvironment = require("./ExecutionEnvironment");
+
+var camelizeStyleName = require("./camelizeStyleName");
+var dangerousStyleValue = require("./dangerousStyleValue");
+var hyphenateStyleName = require("./hyphenateStyleName");
+var memoizeStringOnly = require("./memoizeStringOnly");
+var warning = require("./warning");
+
+var processStyleName = memoizeStringOnly(function(styleName) {
+  return hyphenateStyleName(styleName);
+});
+
+var styleFloatAccessor = 'cssFloat';
+if (ExecutionEnvironment.canUseDOM) {
+  // IE8 only supports accessing cssFloat (standard) as styleFloat
+  if (document.documentElement.style.cssFloat === undefined) {
+    styleFloatAccessor = 'styleFloat';
+  }
+}
+
+if ("production" !== process.env.NODE_ENV) {
+  // 'msTransform' is correct, but the other prefixes should be capitalized
+  var badVendoredStyleNamePattern = /^(?:webkit|moz|o)[A-Z]/;
+
+  // style values shouldn't contain a semicolon
+  var badStyleValueWithSemicolonPattern = /;\s*$/;
+
+  var warnedStyleNames = {};
+  var warnedStyleValues = {};
+
+  var warnHyphenatedStyleName = function(name) {
+    if (warnedStyleNames.hasOwnProperty(name) && warnedStyleNames[name]) {
+      return;
+    }
+
+    warnedStyleNames[name] = true;
+    ("production" !== process.env.NODE_ENV ? warning(
+      false,
+      'Unsupported style property %s. Did you mean %s?',
+      name,
+      camelizeStyleName(name)
+    ) : null);
+  };
+
+  var warnBadVendoredStyleName = function(name) {
+    if (warnedStyleNames.hasOwnProperty(name) && warnedStyleNames[name]) {
+      return;
+    }
+
+    warnedStyleNames[name] = true;
+    ("production" !== process.env.NODE_ENV ? warning(
+      false,
+      'Unsupported vendor-prefixed style property %s. Did you mean %s?',
+      name,
+      name.charAt(0).toUpperCase() + name.slice(1)
+    ) : null);
+  };
+
+  var warnStyleValueWithSemicolon = function(name, value) {
+    if (warnedStyleValues.hasOwnProperty(value) && warnedStyleValues[value]) {
+      return;
+    }
+
+    warnedStyleValues[value] = true;
+    ("production" !== process.env.NODE_ENV ? warning(
+      false,
+      'Style property values shouldn\'t contain a semicolon. ' +
+      'Try "%s: %s" instead.',
+      name,
+      value.replace(badStyleValueWithSemicolonPattern, '')
+    ) : null);
+  };
+
+  /**
+   * @param {string} name
+   * @param {*} value
+   */
+  var warnValidStyle = function(name, value) {
+    if (name.indexOf('-') > -1) {
+      warnHyphenatedStyleName(name);
+    } else if (badVendoredStyleNamePattern.test(name)) {
+      warnBadVendoredStyleName(name);
+    } else if (badStyleValueWithSemicolonPattern.test(value)) {
+      warnStyleValueWithSemicolon(name, value);
+    }
+  };
+}
+
+/**
+ * Operations for dealing with CSS properties.
+ */
+var CSSPropertyOperations = {
+
+  /**
+   * Serializes a mapping of style properties for use as inline styles:
+   *
+   *   > createMarkupForStyles({width: '200px', height: 0})
+   *   "width:200px;height:0;"
+   *
+   * Undefined values are ignored so that declarative programming is easier.
+   * The result should be HTML-escaped before insertion into the DOM.
+   *
+   * @param {object} styles
+   * @return {?string}
+   */
+  createMarkupForStyles: function(styles) {
+    var serialized = '';
+    for (var styleName in styles) {
+      if (!styles.hasOwnProperty(styleName)) {
+        continue;
+      }
+      var styleValue = styles[styleName];
+      if ("production" !== process.env.NODE_ENV) {
+        warnValidStyle(styleName, styleValue);
+      }
+      if (styleValue != null) {
+        serialized += processStyleName(styleName) + ':';
+        serialized += dangerousStyleValue(styleName, styleValue) + ';';
+      }
+    }
+    return serialized || null;
+  },
+
+  /**
+   * Sets the value for multiple styles on a node.  If a value is specified as
+   * '' (empty string), the corresponding style property will be unset.
+   *
+   * @param {DOMElement} node
+   * @param {object} styles
+   */
+  setValueForStyles: function(node, styles) {
+    var style = node.style;
+    for (var styleName in styles) {
+      if (!styles.hasOwnProperty(styleName)) {
+        continue;
+      }
+      if ("production" !== process.env.NODE_ENV) {
+        warnValidStyle(styleName, styles[styleName]);
+      }
+      var styleValue = dangerousStyleValue(styleName, styles[styleName]);
+      if (styleName === 'float') {
+        styleName = styleFloatAccessor;
+      }
+      if (styleValue) {
+        style[styleName] = styleValue;
+      } else {
+        var expansion = CSSProperty.shorthandPropertyExpansions[styleName];
+        if (expansion) {
+          // Shorthand property that IE8 won't like unsetting, so unset each
+          // component to placate it
+          for (var individualStyleName in expansion) {
+            style[individualStyleName] = '';
+          }
+        } else {
+          style[styleName] = '';
+        }
+      }
+    }
+  }
+
+};
+
+module.exports = CSSPropertyOperations;