javascript - 为什么添加此代码后我的图标会发生变化？

Question

所有带星号的代码都是我添加的代码，使标签成为链接

我希望 div 标签成为我搜索了一段时间的社交媒体的链接。我很清楚自己处于学习模式。

<div class="mb_share">
        <div class="button Facebook slide_x">
            <div class="icon"></div>
            <div class="slide>
            <div class="feature">
            **<a href="https://www.facebook.com/profile.php?id=100009674442168></a>
            </div>**
                <span>
                    facebook
                </span>
            </div>
            <div class="native_button">
              <div>
                   Click Here
              </div>
          </div>
        </div>



        <div class="button twitter slide_y">
            <div class="icon"></div>
            <div class="slide">
            **<div class="feature">
            <a href="https://twitter.com/Andigonzolez></a>
            </div>**
                <span>
                    twitter
                </span>
            </div>
            <div class="native_button">
              <div>Click Here       
              </div>
          </div>
        </div>



      <div class="button youtube slide_nx">
            <div class="icon"></div>
            <div class="slide">
            **<div class="feature">
            <a href="https://www.youtube.com/channel/UCmgxz5GCuuc2hrjaj8B4Jgw></a>
            </div>**
                <span>
                    youtube
                </span>
            </div>
                   <div class="native_button">
             <div>Click Here        
              </div>
          </div>
        </div>


      <div class="button gplus slide_ny">
            <div class="icon"></div>
            <div class="slide">
            **<div class="feature">
            <a href="https://plus.google.com/u/0/104726306810821965999/posts"></a>
            </div>**
                <span>
                    google
                </span>
            </div>
                    <div class="native_button">
    <div>Click Here       
              </div>
          </div>
        </div>


      <div class="button linkedin slide_y">
            <div class="icon"> </div>
            <div class="slide">
            **<div class="feature">
            <a href="https://www.linkedin.com/in/andres-gonzalez-076858ba?trk=nav_responsive_tab_profile_pic"></a>
</div>**

                <span>
                    linkedin
                </span>
            </div>
                   <div class="native_button">
             <div>Click Here        
              </div>
          </div>
        </div>


      <div class="button tumblr slide_nx">
            <div class="icon"></div>
            <div class="slide">
                <span>
                    tumblr
                </span>
            </div>
                   <div class="native_button">
              <div>Click Here       
              </div>
          </div>
        </div>


        <div class="button github slide_ny">
            <div class="icon"></div>
            <div class="slide">
                <span>
                    github
                </span>
            </div>
                  <div class="native_button">
              <div>Click Here       
              </div>
          </div>
        </div>  


          <div class="button pinterest slide_x">
            <div class="icon"></div>
            <div class="slide">
                <span>
                    pinterest
                </span>
            </div>
                   <div class="native_button">
              <div>Click Here       
              </div>
          </div>
        </div>  
    </div>
    <div class="separator"></div>

这是 CSS 部分。

@import url(http://fonts.googleapis.com/css?family=Open+Sans:400,300,700,600);
body {
  font-family:Open sans;
}
h1 {
  color:#3e4956;
  font-size:36px;
  text-align:center;
  font-weight:600;
  margin:100px 0 10px;  
}
h2 {
  text-align:center;
  font-size:18px;
  line-height:1.4;
  color:#9da0a4;
}
h2 a {
  color:#9da0a4;
  border-bottom:1px solid #9da0a4;
  text-decoration:none;
}
h2 a:hover {
  color:#000;
  border-color:#000;
}
.separator {
  width:300px;
  border-bottom:1px solid rgb(224, 224, 224);
  margin:0 auto 50px;
}
pre.prettyprint {
  width:656px;
  height:200px;
  margin:25px auto 50px;
  overflow-y:scroll;
}
pre.lang-html.over span {
  opacity:0.5;  
}
pre.lang-html.over span.tutorial, pre.lang-html.over span.tutorial span {
  opacity:1;  
}
.info {
  margin:50px auto 90px;
  width:600px;
  font-size:12px;
}
.info li {
  margin:0 0 10px;
}
.info li span {
  font-family:Menlo, 'Bitstream Vera Sans Mono', 'DejaVu Sans Mono', Monaco, Consolas, monospace;
  display:inline-block;
  padding:5px 10px;
  background:#1d1f21;
  color:#fff;
}
.mb_share {
  width:656px !important;
  overflow:hidden;
  margin:50px auto;
}
.mb_share .button .native_button div {
  font-size:11px;
  color:rgb(124, 124, 124);
}
/*=======================*/

/*=== MB share buttons ===*/
.mb_share .button {
  background:#DCE0E0;
  position:relative;
  float:left;
  margin:0 7px 14px;
  width:150px;
  height:40px; 
  overflow:hidden;
  -webkit-border-radius:3px;
  -moz-border-radius:3px;
  border-radius:3px;
}
.mb_share .button .icon {
  float:left;
  z-index:200;
  position:relative;
  width:40px;
  height:40px;
  -webkit-border-radius:3px 0px 0px 3px;
  -moz-border-radius:3px 0px 0px 3px;
  border-radius:3px 0px 0px 3px;
  background-repeat:no-repeat;
  background-image: url(data:image/svg+xml;base64,<?xml version="1.0" encoding="utf-8"?>
<!-- Generator: Adobe Illustrator 17.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
	 width="120px" height="120px" viewBox="0 0 120 120" enable-background="new 0 0 120 120" xml:space="preserve">
<path id="Facebook_3_" fill="#FFFFFF" d="M57.896,14.66c0,0.432,0,2.359,0,2.359h-1.729v2.887h1.729v8.574h3.556v-8.574h2.384
	c0,0,0.223-1.385,0.331-2.898c-0.312,0-2.701,0-2.701,0s0-1.678,0-1.973s0.388-0.691,0.771-0.691s1.188,0,1.936,0
	c0-0.393,0-1.75,0-3.004c-0.997,0-2.131,0-2.631,0C57.81,11.34,57.896,14.226,57.896,14.66z"/>
<path id="LinkedIn_3_" fill="#FFFFFF" d="M67.712,61.98v5.609H64.46v-5.234c0-1.313-0.472-2.211-1.647-2.211
	c-0.899,0-1.435,0.604-1.67,1.188c-0.086,0.209-0.107,0.5-0.107,0.793v5.464H57.78c0,0,0.045-8.865,0-9.783h3.256v1.388
	c-0.008,0.012-0.016,0.021-0.021,0.03h0.021v-0.03c0.432-0.666,1.203-1.617,2.931-1.617C66.107,57.575,67.712,58.975,67.712,61.98z
	 M54.375,53.09c-1.113,0-1.843,0.729-1.843,1.688c0,0.941,0.708,1.693,1.799,1.693h0.022c1.135,0,1.841-0.752,1.841-1.693
	C56.173,53.821,55.488,53.09,54.375,53.09z M52.725,67.59h3.254v-9.783h-3.254V67.59z"/>
<path fill="#FFFFFF" d="M28.71,15.17c-0.622,0.276-1.291,0.462-1.992,0.546c0.716-0.43,1.266-1.109,1.525-1.92
	c-0.67,0.398-1.413,0.687-2.203,0.842c-0.632-0.674-1.535-1.096-2.532-1.096c-1.916,0-3.469,1.553-3.469,3.469
	c0,0.272,0.031,0.537,0.09,0.791c-2.884-0.145-5.439-1.526-7.151-3.625c-0.299,0.512-0.47,1.108-0.47,1.745
	c0,1.204,0.612,2.265,1.543,2.887c-0.569-0.019-1.104-0.174-1.572-0.434c0,0.014,0,0.029,0,0.043c0,1.681,1.196,3.083,2.783,3.402
	c-0.291,0.08-0.597,0.122-0.914,0.122c-0.224,0-0.441-0.022-0.653-0.062c0.441,1.378,1.723,2.381,3.241,2.409
	c-1.187,0.931-2.683,1.485-4.309,1.485c-0.28,0-0.556-0.016-0.828-0.048c1.535,0.984,3.359,1.558,5.318,1.558
	c6.381,0,9.871-5.286,9.871-9.871c0-0.15-0.003-0.3-0.01-0.448C27.657,16.477,28.244,15.866,28.71,15.17z"/>
<path id="Tumblr_2_" fill="#FFFFFF" d="M101.429,65.461c-0.278-0.164-0.536-0.445-0.638-0.72c-0.104-0.272-0.092-0.828-0.092-1.793
	v-4.264h3.877v-2.967h-3.877v-3.846h-2.383c-0.107,0.855-0.304,1.563-0.589,2.119c-0.284,0.555-0.659,1.029-1.131,1.428
	c-0.469,0.396-1.231,0.701-1.892,0.91v2.354h2.277v5.83c0,0.763,0.08,1.342,0.24,1.742c0.162,0.397,0.449,0.776,0.866,1.135
	c0.415,0.353,0.918,0.627,1.507,0.82c0.589,0.188,1.041,0.284,1.809,0.284c0.676,0,1.303-0.067,1.885-0.198
	c0.58-0.138,1.229-0.373,1.945-0.705v-2.621c-0.84,0.547-1.685,0.819-2.533,0.819C102.224,65.79,101.801,65.682,101.429,65.461z"/>
<path id="YouTube_2_" fill="#FFFFFF" d="M105.943,24.404h-1.101l0.006-0.639c0-0.284,0.231-0.516,0.519-0.516h0.07
	c0.284,0,0.52,0.232,0.52,0.516L105.943,24.404z M101.82,23.035c-0.278,0-0.508,0.187-0.508,0.417v3.106
	c0,0.229,0.229,0.416,0.508,0.416c0.279,0,0.508-0.188,0.508-0.416v-3.106C102.326,23.222,102.1,23.035,101.82,23.035z
	 M108.516,21.298v5.907c0,1.418-1.229,2.577-2.73,2.577H94.553c-1.503,0-2.73-1.159-2.73-2.577v-5.907
	c0-1.417,1.229-2.578,2.73-2.578h11.232C107.287,18.72,108.516,19.88,108.516,21.298z M95.302,27.847v-6.224l1.394,0.001v-0.922
	l-3.713-0.005v0.906l1.159,0.003v6.241H95.302z M99.477,22.551h-1.16v3.324c0,0.48,0.027,0.721-0.002,0.806
	c-0.096,0.258-0.52,0.531-0.685,0.028c-0.028-0.089-0.004-0.354-0.005-0.812l-0.004-3.346h-1.154l0.003,3.293
	c0.001,0.505-0.013,0.882,0.004,1.053c0.028,0.302,0.019,0.655,0.3,0.855c0.521,0.376,1.522-0.057,1.772-0.594l-0.001,0.687
	l0.932,0.001C99.477,27.846,99.477,22.551,99.477,22.551z M103.191,26.355l-0.004-2.766c-0.001-1.055-0.789-1.686-1.861-0.833
	l0.006-2.057l-1.159,0.001l-0.007,7.1l0.951-0.015l0.088-0.441C102.425,28.463,103.193,27.697,103.191,26.355z M106.822,25.989
	l-0.869,0.004c-0.002,0.035-0.002,0.075-0.004,0.119v0.485c0,0.259-0.215,0.471-0.475,0.471h-0.171
	c-0.262,0-0.476-0.212-0.476-0.471v-0.054v-0.535V25.32h1.992v-0.751c0-0.548-0.015-1.096-0.06-1.41
	c-0.142-0.991-1.534-1.149-2.237-0.641c-0.221,0.158-0.389,0.37-0.486,0.656c-0.1,0.284-0.147,0.675-0.147,1.169v1.649
	C103.89,28.736,107.22,28.347,106.822,25.989z M102.357,17.035c0.062,0.146,0.153,0.264,0.28,0.352
	c0.123,0.088,0.283,0.132,0.476,0.132c0.166,0,0.313-0.045,0.443-0.139c0.129-0.092,0.237-0.231,0.326-0.416l-0.021,0.455h1.293
	v-5.503h-1.019v4.283c0,0.232-0.192,0.422-0.425,0.422s-0.424-0.19-0.424-0.422v-4.283h-1.063v3.711
	c0,0.473,0.009,0.788,0.022,0.948C102.262,16.735,102.298,16.888,102.357,17.035z M98.438,13.927c0-0.528,0.045-0.94,0.131-1.237
	c0.088-0.297,0.246-0.535,0.477-0.715c0.229-0.18,0.521-0.271,0.877-0.271c0.299,0,0.556,0.059,0.771,0.174
	c0.215,0.116,0.381,0.266,0.496,0.452c0.116,0.186,0.196,0.377,0.238,0.573c0.044,0.198,0.064,0.497,0.064,0.901v1.392
	c0,0.51-0.021,0.886-0.06,1.124c-0.04,0.239-0.125,0.46-0.256,0.669c-0.129,0.206-0.296,0.359-0.498,0.457
	c-0.204,0.1-0.438,0.148-0.702,0.148c-0.294,0-0.543-0.041-0.747-0.126c-0.206-0.084-0.364-0.212-0.478-0.381
	c-0.114-0.169-0.194-0.376-0.243-0.617s-0.071-0.603-0.071-1.085L98.438,13.927L98.438,13.927z M99.449,16.113
	c0,0.312,0.232,0.566,0.515,0.566s0.514-0.254,0.514-0.566v-2.929c0-0.312-0.229-0.565-0.514-0.565
	c-0.281,0-0.515,0.254-0.515,0.565V16.113z M95.869,17.593h1.221l0.001-4.221l1.442-3.615h-1.336l-0.767,2.686l-0.778-2.692h-1.32
	l1.535,3.624L95.869,17.593z"/>
<g>
	<g>
		<polygon fill="#FFFFFF" points="28.351,59.391 25.89,59.391 25.89,56.929 24.658,56.929 24.658,59.391 22.197,59.391 
			22.197,60.62 24.658,60.62 24.658,63.081 25.89,63.081 25.89,60.62 28.351,60.62 		"/>
	</g>
	<g>
		<g>
			<path fill="#FFFFFF" d="M19.661,62.278c-0.495-0.371-1.571-1.132-1.571-1.644c0-0.599,0.172-0.894,1.072-1.597
				c0.923-0.723,1.576-1.672,1.576-2.853c0-1.286-0.525-2.45-1.515-3.019h1.401l1.192-1.25c0,0-3.94,0-5.336,0
				c-2.709,0-4.964,1.996-4.964,4.193c0,2.243,1.482,4.031,4.028,4.031c0.178,0,0.349-0.009,0.518-0.021
				c-0.165,0.316-0.283,0.67-0.283,1.039c0,0.625,0.344,0.979,0.768,1.394c-0.321,0-0.631,0.008-0.967,0.008
				c-3.102,0-5.271,2.134-5.271,4.183c0,2.016,2.616,3.276,5.716,3.276c3.535,0,5.708-2.006,5.708-4.021
				C21.734,64.383,21.384,63.569,19.661,62.278z M16.578,59.327c-1.438-0.043-2.806-1.362-3.055-3.25
				c-0.247-1.89,0.717-3.334,2.154-3.293c1.438,0.045,2.669,1.595,2.917,3.481C18.843,58.155,18.015,59.37,16.578,59.327z
				 M16.015,69.13c-2.144,0-3.69-1.356-3.69-2.985c0-1.597,1.815-2.975,3.958-2.95c0.5,0.004,0.966,0.086,1.389,0.223
				c1.164,0.809,2.102,1.313,2.338,2.236c0.044,0.186,0.067,0.379,0.067,0.574C20.076,67.858,19.027,69.13,16.015,69.13z"/>
		</g>
	</g>
</g>
<path id="Github__x28_alt_x29__3_" fill="#FFFFFF" d="M25.487,91.34c0.311,0.703,0.512,1.873,0.212,2.729
	c1.225,1.047,1.646,3.592,1.055,5.67c1.747,0.133,3.827-0.063,5.171,0.471c-1.256-0.159-2.971-0.477-4.59-0.366
	c-0.308,0.021-0.762-0.011-0.739,0.42c1.874,0.146,3.737,0.31,5.276,0.789c-1.526-0.25-3.379-0.629-5.276-0.685
	c-0.784,1.547-2.361,2.308-4.537,2.468c0.233,0.51,0.682,0.702,0.792,1.521c0.162,1.225-0.256,3.016,0.156,3.832
	c0.199,0.391,0.522,0.4,0.74,0.736c-0.534,0.631-1.855-0.072-2.007-0.736c-0.257-1.139,0.393-2.902-0.315-3.674
	c0.05,1.242-0.293,2.984,0.053,4.094c0.137,0.437,0.53,0.605,0.423,0.998c-2.479,0.252-1.443-3.207-1.85-5.25
	c-0.373,0.027-0.21,0.561-0.211,0.789c-0.01,1.994,0.408,4.729-1.741,4.461c-0.063-0.418,0.288-0.562,0.421-0.943
	c0.395-1.123-0.072-2.795,0.107-4.147c-0.82,0.619,0.086,2.776-0.422,3.886c-0.293,0.637-1.238,0.913-1.954,0.629
	c0.093-0.476,0.585-0.396,0.792-0.841c0.291-0.614,0.002-1.504,0.105-2.413c-1.519,0.303-2.697-0.044-3.273-0.998
	c-0.258-0.429-0.322-0.933-0.633-1.312c-0.311-0.381-0.807-0.433-0.95-0.945c1.88-0.452,1.953,1.937,3.643,1.994
	c0.518,0.021,0.786-0.147,1.267-0.262c0.135-0.604,0.422-1.052,0.844-1.365c-2.102-0.287-3.838-0.94-4.645-2.521
	c-1.912,0.095-3.66,0.351-5.279,0.736c1.469-0.535,3.283-0.727,5.227-0.789c-0.115-0.688-1.119-0.498-1.742-0.473
	c-1.158,0.051-2.617,0.195-3.537,0.367c1.336-0.475,3.207-0.416,5.016-0.418c-0.554-1.734-0.361-4.486,0.845-5.512
	c-0.343-0.861-0.235-2.271,0.211-2.939c1.347,0.061,2.163,0.646,3.009,1.207c1.049-0.299,2.152-0.447,3.59-0.367
	c0.605,0.033,1.233,0.305,1.688,0.262c0.446-0.043,0.938-0.543,1.372-0.734C24.364,91.457,24.842,91.363,25.487,91.34z"/>
<g>
	<path fill="#FFFFFF" d="M59.17,91.937c-4.469,0-8.094,3.624-8.094,8.093c0,3.313,1.994,6.162,4.845,7.414
		c-0.022-0.564-0.005-1.244,0.141-1.859c0.156-0.656,1.041-4.408,1.041-4.408s-0.258-0.518-0.258-1.281
		c0-1.199,0.694-2.096,1.562-2.096c0.736,0,1.092,0.553,1.092,1.215c0,0.741-0.473,1.848-0.715,2.873
		c-0.203,0.857,0.431,1.559,1.277,1.559c1.533,0,2.566-1.97,2.566-4.303c0-1.773-1.195-3.102-3.368-3.102
		c-2.456,0-3.983,1.83-3.983,3.875c0,0.705,0.207,1.203,0.532,1.587c0.149,0.178,0.171,0.249,0.116,0.452
		c-0.039,0.148-0.128,0.508-0.165,0.649c-0.054,0.204-0.22,0.277-0.403,0.202c-1.132-0.461-1.658-1.7-1.658-3.093
		c0-2.3,1.939-5.056,5.785-5.056c3.088,0,5.123,2.235,5.123,4.637c0,3.175-1.766,5.547-4.367,5.547c-0.873,0-1.695-0.473-1.979-1.01
		c0,0-0.471,1.863-0.568,2.226c-0.172,0.623-0.508,1.248-0.814,1.733c0.729,0.215,1.496,0.332,2.294,0.332
		c4.47,0,8.093-3.625,8.093-8.094C67.263,95.561,63.64,91.937,59.17,91.937z"/>
</g>
</svg>
);
}
.mb_share .button .native_button {
  width:110px;
  height:40px;
  float:left;
  background:#DCE0E0 !important;
  display:table;
}
.mb_share .button .native_button > div {
  display:table-cell;
  vertical-align:middle;
  text-align:center;
}
.mb_share .button .slide {
  position:absolute;
  right:0;
  top:0;
  z-index:100;
  float:left;
  width:110px;
  height:40px;
  transition:.2s transform linear;
  -webkit-transition:.2s -webkit-transform linear;
  -moz-transition:.2s -moz-transform linear;
}
.mb_share .button .slide span {
  color:#fff;
  display:block;
  cursor:default;
  width:100%;
  text-align:center;
  margin:10px 0;
  padding:2px 0;
  font-size:16px;
  border-left:1px solid rgba(255,255,255,0.35);
}
/* Transitions */
.mb_share .button.slide_x:hover .slide {
  -webkit-transform:translateX(110px);
  -moz-transform:translateX(110px);
  transform:translateX(110px);
}
.mb_share .button.slide_nx:hover .slide {
  -webkit-transform:translateX(-110px);
  -moz-transform:translateX(-110px);
  transform:translateX(-110px);
}
.mb_share .button.slide_y:hover .slide {
  -webkit-transform:translateY(40px);
  -moz-transform:translateY(40px);
  transform:translateY(40px);
}
.mb_share .button.slide_ny:hover .slide {
  -webkit-transform:translateY(-40px);
  -moz-transform:translateY(-40px);
  transform:translateY(-40px);
}
/*========================*/
/*=== Colors ===*/

/* FACEBOOK */
.mb_share .button.facebook .icon {
  background-position:-40px 0;
}
.mb_share .button.facebook > div {
  background-color:#305c99;
}
/* TWITTER */
.mb_share .button.twitter .icon {
  background-position:0 0;
}
.mb_share .button.twitter > div {
  background-color:#00cdff;
}
/* YOUTUBE */
.mb_share .button.youtube .icon {
  background-position:-80px 0;
}
.mb_share .button.youtube > div {
  background-color:#e22b26;
}
/* GOOGLE PLUS */
.mb_share .button.gplus .icon {
  background-position:0 -40px;
}
.mb_share .button.gplus > div {
  background-color:#3f3d3e;
}
/* LINKEDIN */
.mb_share .button.linkedin .icon {
  background-position:-40px -40px;
}
.mb_share .button.linkedin > div {
  background-color:#007bb6;
}
/* TUMBLR */
.mb_share .button.tumblr .icon {
  background-position:-80px -40px;
}
.mb_share .button.tumblr > div {
  background-color:#2c4762;
}
/* GITHUB */
.mb_share .button.github .icon {
  background-position:0 -80px;
}
.mb_share .button.github > div {
  background-color:#42c0fb;
}
/* PINTEREST */
.mb_share .button.pinterest .icon {
  background-position:-40px -80px;
}
.mb_share .button.pinterest > div {
  background-color:#dc0d0a;
}
div.feature {
    position: relative;
}

div.feature a {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    text-decoration: none; /* No underlines on the link */
    z-index: 10; /* Places the link above everything else in the div */
    background-color: #FFF; /* Fix to make div clickable in IE */
    opacity: 0; /* Fix to make div clickable in IE */
    filter: alpha(opacity=1); /* Fix to make div clickable in IE */
}


/*==============*/

Answer 1

使用 a 标签代替 div。像这样。看到这个 fiddle 。

<a href="twitter.com"><span class="fa fa-twitter"></span></a>

https://jsfiddle.net/n23Lopon/1/