修改bug

node_modules/style-loader/dist/runtime/singletonStyleDomAPI.js

@@ -0,0 +1,86 @@
+"use strict";
+
+/* istanbul ignore next  */
+var replaceText = function replaceText() {
+  var textStore = [];
+  return function replace(index, replacement) {
+    textStore[index] = replacement;
+    return textStore.filter(Boolean).join("\n");
+  };
+}();
+
+/* istanbul ignore next  */
+function apply(styleElement, index, remove, obj) {
+  var css;
+  if (remove) {
+    css = "";
+  } else {
+    css = "";
+    if (obj.supports) {
+      css += "@supports (".concat(obj.supports, ") {");
+    }
+    if (obj.media) {
+      css += "@media ".concat(obj.media, " {");
+    }
+    var needLayer = typeof obj.layer !== "undefined";
+    if (needLayer) {
+      css += "@layer".concat(obj.layer.length > 0 ? " ".concat(obj.layer) : "", " {");
+    }
+    css += obj.css;
+    if (needLayer) {
+      css += "}";
+    }
+    if (obj.media) {
+      css += "}";
+    }
+    if (obj.supports) {
+      css += "}";
+    }
+  }
+
+  // For old IE
+  /* istanbul ignore if  */
+  if (styleElement.styleSheet) {
+    styleElement.styleSheet.cssText = replaceText(index, css);
+  } else {
+    var cssNode = document.createTextNode(css);
+    var childNodes = styleElement.childNodes;
+    if (childNodes[index]) {
+      styleElement.removeChild(childNodes[index]);
+    }
+    if (childNodes.length) {
+      styleElement.insertBefore(cssNode, childNodes[index]);
+    } else {
+      styleElement.appendChild(cssNode);
+    }
+  }
+}
+var singletonData = {
+  singleton: null,
+  singletonCounter: 0
+};
+
+/* istanbul ignore next  */
+function domAPI(options) {
+  if (typeof document === "undefined") return {
+    update: function update() {},
+    remove: function remove() {}
+  };
+
+  // eslint-disable-next-line no-undef,no-use-before-define
+  var styleIndex = singletonData.singletonCounter++;
+  var styleElement =
+  // eslint-disable-next-line no-undef,no-use-before-define
+  singletonData.singleton || (
+  // eslint-disable-next-line no-undef,no-use-before-define
+  singletonData.singleton = options.insertStyleElement(options));
+  return {
+    update: function update(obj) {
+      apply(styleElement, styleIndex, false, obj);
+    },
+    remove: function remove(obj) {
+      apply(styleElement, styleIndex, true, obj);
+    }
+  };
+}
+module.exports = domAPI;