집 > 기사 > 웹 프론트엔드 > 숨겨진 요소의 너비와 높이를 가져오지 못하는 문제를 해결하는 방법

숨겨진 요소의 너비와 높이를 가져오지 못하는 문제를 해결하는 방법

小云云원래의: 2018-01-23 13:13:491753검색

실제 개발에서는 숨겨진 요소의 너비와 높이를 얻어야 하는 경우가 있습니다. 여기에 언급된 숨겨진 요소는 표시가 없음으로 설정된 요소입니다. 이번 글에서는 좋은 참고값을 가지고 있는 숨겨진 요소(display:none)의 너비(width)와 높이(height)를 얻을 수 없는 문제에 대한 해결 방법을 주로 소개합니다. 아래 편집기를 살펴보겠습니다. 모든 사람에게 도움이 되기를 바랍니다.

jQuery Actual Plugin 플러그인을 사용하여 완성할 수 있으며 소스 코드는 다음과 같습니다.

;( function ( $ ){
 $.fn.addBack = $.fn.addBack || $.fn.andSelf;
 $.fn.extend({
  actual : function ( method, options ){
   // check if the jQuery method exist
   if( !this[ method ]){
    throw &#39;$.actual => The jQuery method "&#39; + method + &#39;" you called does not exist&#39;;
   }
   var defaults = {
    absolute   : false,
    clone     : false,
    includeMargin : false,
    display    : &#39;block&#39;
   };
   var configs = $.extend( defaults, options );
   var $target = this.eq( 0 );
   var fix, restore;
   if( configs.clone === true ){
    fix = function (){
     var style = &#39;position: absolute !important; top: -1000 !important; &#39;;
     // this is useful with css3pie
     $target = $target.
      clone().
      attr( &#39;style&#39;, style ).
      appendTo( &#39;body&#39; );
    };
    restore = function (){
     // remove DOM element after getting the width
     $target.remove();
    };
   }else{
    var tmp  = [];
    var style = &#39;&#39;;
    var $hidden;
    fix = function (){
     // get all hidden parents
     $hidden = $target.parents().addBack().filter( &#39;:hidden&#39; );
     style  += &#39;visibility: hidden !important; display: &#39; + configs.display + &#39; !important; &#39;;
     if( configs.absolute === true ) style += &#39;position: absolute !important; &#39;;
     // save the origin style props
     // set the hidden el css to be got the actual value later
     $hidden.each( function (){
      // Save original style. If no style was set, attr() returns undefined
      var $this   = $( this );
      var thisStyle = $this.attr( &#39;style&#39; );
      tmp.push( thisStyle );
      // Retain as much of the original style as possible, if there is one
      $this.attr( &#39;style&#39;, thisStyle ? thisStyle + &#39;;&#39; + style : style );
     });
    };
    restore = function (){
     // restore origin style values
     $hidden.each( function ( i ){
      var $this = $( this );
      var _tmp = tmp[ i ];

      if( _tmp === undefined ){
       $this.removeAttr( &#39;style&#39; );
      }else{
       $this.attr( &#39;style&#39;, _tmp );
      }
     });
    };
   }
   fix();
   // get the actual value with user specific methed
   // it can be &#39;width&#39;, &#39;height&#39;, &#39;outerWidth&#39;, &#39;innerWidth&#39;... etc
   // configs.includeMargin only works for &#39;outerWidth&#39; and &#39;outerHeight&#39;
   var actual = /(outer)/.test( method ) ?
    $target[ method ]( configs.includeMargin ) :
    $target[ method ]();
   restore();
   // IMPORTANT, this plugin only return the value of the first element
   return actual;
  }
 });
})(jQuery);

물론 모듈 개발을 지원하려면 파일을 직접 사용할 수 있습니다. 공식 웹사이트에서 다운로드했으며 소스 코드도 게시되어 있습니다:

;( function ( factory ) {
if ( typeof define === &#39;function&#39; && define.amd ) {
  // AMD. Register module depending on jQuery using requirejs define.
  define( [&#39;jquery&#39;], factory );
} else {
  // No AMD.
  factory( jQuery );
}
}( function ( $ ){
 $.fn.addBack = $.fn.addBack || $.fn.andSelf;
 $.fn.extend({
  actual : function ( method, options ){
   // check if the jQuery method exist
   if( !this[ method ]){
    throw &#39;$.actual => The jQuery method "&#39; + method + &#39;" you called does not exist&#39;;
   }
   var defaults = {
    absolute   : false,
    clone     : false,
    includeMargin : false,
    display    : &#39;block&#39;
   };
   var configs = $.extend( defaults, options );
   var $target = this.eq( 0 );
   var fix, restore;
   if( configs.clone === true ){
    fix = function (){
     var style = &#39;position: absolute !important; top: -1000 !important; &#39;;
     // this is useful with css3pie
     $target = $target.
      clone().
      attr( &#39;style&#39;, style ).
      appendTo( &#39;body&#39; );
    };
    restore = function (){
     // remove DOM element after getting the width
     $target.remove();
    };
   }else{
    var tmp  = [];
    var style = &#39;&#39;;
    var $hidden;
    fix = function (){
     // get all hidden parents
     $hidden = $target.parents().addBack().filter( &#39;:hidden&#39; );
     style  += &#39;visibility: hidden !important; display: &#39; + configs.display + &#39; !important; &#39;;
     if( configs.absolute === true ) style += &#39;position: absolute !important; &#39;;
     // save the origin style props
     // set the hidden el css to be got the actual value later
     $hidden.each( function (){
      // Save original style. If no style was set, attr() returns undefined
      var $this   = $( this );
      var thisStyle = $this.attr( &#39;style&#39; );
      tmp.push( thisStyle );
      // Retain as much of the original style as possible, if there is one
      $this.attr( &#39;style&#39;, thisStyle ? thisStyle + &#39;;&#39; + style : style );
     });
    };
    restore = function (){
     // restore origin style values
     $hidden.each( function ( i ){
      var $this = $( this );
      var _tmp = tmp[ i ];

      if( _tmp === undefined ){
       $this.removeAttr( &#39;style&#39; );
      }else{
       $this.attr( &#39;style&#39;, _tmp );
      }
     });
    };
   }
   fix();
   // get the actual value with user specific methed
   // it can be &#39;width&#39;, &#39;height&#39;, &#39;outerWidth&#39;, &#39;innerWidth&#39;... etc
   // configs.includeMargin only works for &#39;outerWidth&#39; and &#39;outerHeight&#39;
   var actual = /(outer)/.test( method ) ?
    $target[ method ]( configs.includeMargin ) :
    $target[ method ]();
   restore();
   // IMPORTANT, this plugin only return the value of the first element
   return actual;
  }
 });
}));

코드 예:

//get hidden element actual width
$(&#39;.hidden&#39;).actual(&#39;width&#39;);
//get hidden element actual innerWidth
$(&#39;.hidden&#39;).actual(&#39;innerWidth&#39;);
//get hidden element actual outerWidth
$(&#39;.hidden&#39;).actual(&#39;outerWidth&#39;);
//get hidden element actual outerWidth and set the `includeMargin` argument
$(&#39;.hidden&#39;).actual(&#39;outerWidth&#39;,{includeMargin:true});
//get hidden element actual height
$(&#39;.hidden&#39;).actual(&#39;height&#39;);
//get hidden element actual innerHeight
$(&#39;.hidden&#39;).actual(&#39;innerHeight&#39;);
//get hidden element actual outerHeight
$(&#39;.hidden&#39;).actual(&#39;outerHeight&#39;);
// get hidden element actual outerHeight and set the `includeMargin` argument
$(&#39;.hidden&#39;).actual(&#39;outerHeight&#39;,{includeMargin:true});
//if the page jumps or blinks, pass a attribute &#39;{ absolute : true }&#39;
//be very careful, you might get a wrong result depends on how you makrup your html and css
$(&#39;.hidden&#39;).actual(&#39;height&#39;,{absolute:true});
// if you use css3pie with a float element
// for example a rounded corner navigation menu you can also try to pass a attribute &#39;{ clone : true }&#39;
// please see demo/css3pie in action
$(&#39;.hidden&#39;).actual(&#39;width&#39;,{clone:true});

숨겨진 요소의 너비와 높이를 가져오지 못하는 문제를 해결하는 방법

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