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fix(ssr): prevent execute it in a not-browser environment #173

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fix(ssr): prevent execute it in a not-browser environment #173

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16 changes: 14 additions & 2 deletions src/layout.js
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Original file line number Diff line number Diff line change
Expand Up @@ -8,8 +8,14 @@

'use strict';

const canUseDOM = !!(
typeof window !== 'undefined'
&& window.document
&& window.document.createElement
);

// setImmediate
if (!window.setImmediate) {
if (canUseDOM && !window.setImmediate) {
window.setImmediate = (function setupSetImmediate() {
return (
window.msSetImmediate ||
Expand Down Expand Up @@ -80,7 +86,7 @@ if (!window.setImmediate) {
})();
}

if (!window.clearImmediate) {
if (canUseDOM && !window.clearImmediate) {
window.clearImmediate = (function setupClearImmediate() {
return (
window.msClearImmediate ||
Expand All @@ -98,6 +104,9 @@ if (!window.clearImmediate) {

// Check if WordCloud can run on this browser
var isSupported = (function isSupported() {
if (!canUseDOM) {
return true;
}
var canvas = document.createElement('canvas');
if (!canvas || !canvas.getContext) {
return false;
Expand Down Expand Up @@ -127,6 +136,9 @@ var isSupported = (function isSupported() {
// Find out if the browser impose minium font size by
// drawing small texts on a canvas and measure it's width.
var minFontSize = (function getMinFontSize() {
if (!canUseDOM) {
return;
}
if (!isSupported) {
return;
}
Expand Down