import env from '../core/env.js';
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var urn = 'urn:schemas-microsoft-com:vml';
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var win = typeof window === 'undefined' ? null : window;
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var vmlInited = false;
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export var doc = win && win.document;
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export function createNode(tagName) {
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return doCreateNode(tagName);
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}
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var doCreateNode;
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if (doc && !env.canvasSupported) {
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try {
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!doc.namespaces.zrvml && doc.namespaces.add('zrvml', urn);
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doCreateNode = function (tagName) {
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return doc.createElement('<zrvml:' + tagName + ' class="zrvml">');
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};
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}
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catch (e) {
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doCreateNode = function (tagName) {
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return doc.createElement('<' + tagName + ' xmlns="' + urn + '" class="zrvml">');
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};
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}
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}
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export function initVML() {
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if (vmlInited || !doc) {
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return;
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}
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vmlInited = true;
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var styleSheets = doc.styleSheets;
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if (styleSheets.length < 31) {
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doc.createStyleSheet().addRule('.zrvml', 'behavior:url(#default#VML)');
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}
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else {
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styleSheets[0].addRule('.zrvml', 'behavior:url(#default#VML)');
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}
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}
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