我使用这个方法获取，出现错误： TypeError: window.getComputedStyle is not a function     at wrapText (render.js? [sm]:19)     at ScreenCont.renderText (screencont.js? [sm]:63)     at ScreenCont.render (screencont.js? [sm]:55)     at GameScene.render (gamescene.js? [sm]:86)     at Main.render (main.js? [sm]:125)     at Main.loop (main.js? [sm]:170)     at VM2202 WAGameSubContext.js:1     at Function.cbWithTimeStamp (gamePage.html:58)     at p (VM2186 WAGame.js:1)     at VM2186 WAGame.js:1