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node_modules/vant/lib/utils/format/unit.js

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+"use strict";
+
+exports.__esModule = true;
+exports.addUnit = addUnit;
+exports.unitToPx = unitToPx;
+
+var _ = require("..");
+
+var _number = require("../validate/number");
+
+function addUnit(value) {
+  if (!(0, _.isDef)(value)) {
+    return undefined;
+  }
+
+  value = String(value);
+  return (0, _number.isNumeric)(value) ? value + "px" : value;
+} // cache
+
+
+var rootFontSize;
+
+function getRootFontSize() {
+  if (!rootFontSize) {
+    var doc = document.documentElement;
+    var fontSize = doc.style.fontSize || window.getComputedStyle(doc).fontSize;
+    rootFontSize = parseFloat(fontSize);
+  }
+
+  return rootFontSize;
+}
+
+function convertRem(value) {
+  value = value.replace(/rem/g, '');
+  return +value * getRootFontSize();
+}
+
+function convertVw(value) {
+  value = value.replace(/vw/g, '');
+  return +value * window.innerWidth / 100;
+}
+
+function convertVh(value) {
+  value = value.replace(/vh/g, '');
+  return +value * window.innerHeight / 100;
+}
+
+function unitToPx(value) {
+  if (typeof value === 'number') {
+    return value;
+  }
+
+  if (_.inBrowser) {
+    if (value.indexOf('rem') !== -1) {
+      return convertRem(value);
+    }
+
+    if (value.indexOf('vw') !== -1) {
+      return convertVw(value);
+    }
+
+    if (value.indexOf('vh') !== -1) {
+      return convertVh(value);
+    }
+  }
+
+  return parseFloat(value);
+}