js monitor screen orientation does not monitor how the first default

this.supportOrientation = typeof window.orientation === 'number'; 

//  检查屏幕方向
    checkScreenOrientation() {
        if (this.supportOrientation) {
            if (window.orientation === 0) {
                this.screenOrientation = 'portrait';
            }
            if (window.orientation === 90 || window.orientation === -90) {
                this.screenOrientation = 'landscape';
            }
        } else {
            this? .screenOrientation = (window.innerWidth> window.innerHeight) 'Landscape': 'Portrait' ; 
        } 
       // IF (this.orientationFlag) {// is true when the exchange screen aspect 
            the let TEMP = the this .bodyWidth;
        / /      this.bodyWidth = this.bodyHeight; 
        //     this.bodyHeight = TEMP; 
        // } the else { 
         //    this.orientationFlag = to true; 
        // } 
IF ( the this .orientationFlag) { 
         imageMof (); // reset the image height 
      } the else {
          the this .orientationFlag = to true ;  
      }
}

 

It sometimes there is a demand to re-execute a rendering function when the screen orientation changes, to get the actual width and height of the changed direction, but the first loads of execution function to execute in other places, this time you can add a flag state value, default is false, the detected direction when the first time and then to change true.

There is a good recommendation related articles: https://div.io/topic/1828

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