feat: use inner icon to replace back-top background-img (#24397)

* feat: use inner icon to  replace back-top background-img

* chore: update snapshots

components/back-top/index.tsx

@@ -3,6 +3,7 @@ import Animate from 'rc-animate';
 import addEventListener from 'rc-util/lib/Dom/addEventListener';
 import classNames from 'classnames';
 import omit from 'omit.js';
+import VerticalAlignTopOutlined from '@ant-design/icons/VerticalAlignTopOutlined';
 import throttleByAnimationFrame from '../_util/throttleByAnimationFrame';
 import { ConfigContext } from '../config-provider';
 import getScroll from '../_util/getScroll';
@@ -80,7 +81,9 @@ const BackTop: React.FC<BackTopProps> = props => {
     const { children } = props;
     const defaultElement = (
       <div className={`${prefixCls}-content`}>
-        <div className={`${prefixCls}-icon`} />
+        <div className={`${prefixCls}-icon`}>
+          <VerticalAlignTopOutlined />
+        </div>
       </div>
     );
     return (

components/back-top/style/index.less

@@ -37,11 +37,8 @@
   }
 
   &-icon {
-    width: 14px;
+    font-size: 24px;
-    height: 16px;
+    line-height: 40px;
-    margin: 12px auto;
-    background: url(data:image/png;base64,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)
-      ~'100%/100%' no-repeat;
   }
 }
 

components/config-provider/__tests__/__snapshots__/components.test.js.snap

@@ -562,7 +562,28 @@ exports[`ConfigProvider components BackTop configProvider 1`] = `
     >
       <div
         class="config-back-top-icon"
-      />
+      >
+        <span
+          aria-label="vertical-align-top"
+          class="anticon anticon-vertical-align-top"
+          role="img"
+        >
+          <svg
+            aria-hidden="true"
+            class=""
+            data-icon="vertical-align-top"
+            fill="currentColor"
+            focusable="false"
+            height="1em"
+            viewBox="64 64 896 896"
+            width="1em"
+          >
+            <path
+              d="M859.9 168H164.1c-4.5 0-8.1 3.6-8.1 8v60c0 4.4 3.6 8 8.1 8h695.8c4.5 0 8.1-3.6 8.1-8v-60c0-4.4-3.6-8-8.1-8zM518.3 355a8 8 0 00-12.6 0l-112 141.7a7.98 7.98 0 006.3 12.9h73.9V848c0 4.4 3.6 8 8 8h60c4.4 0 8-3.6 8-8V509.7H624c6.7 0 10.4-7.7 6.3-12.9L518.3 355z"
+            />
+          </svg>
+        </span>
+      </div>
     </div>
   </div>
 </div>
@@ -578,7 +599,28 @@ exports[`ConfigProvider components BackTop configProvider componentSize large 1`
     >
       <div
         class="config-back-top-icon"
-      />
+      >
+        <span
+          aria-label="vertical-align-top"
+          class="anticon anticon-vertical-align-top"
+          role="img"
+        >
+          <svg
+            aria-hidden="true"
+            class=""
+            data-icon="vertical-align-top"
+            fill="currentColor"
+            focusable="false"
+            height="1em"
+            viewBox="64 64 896 896"
+            width="1em"
+          >
+            <path
+              d="M859.9 168H164.1c-4.5 0-8.1 3.6-8.1 8v60c0 4.4 3.6 8 8.1 8h695.8c4.5 0 8.1-3.6 8.1-8v-60c0-4.4-3.6-8-8.1-8zM518.3 355a8 8 0 00-12.6 0l-112 141.7a7.98 7.98 0 006.3 12.9h73.9V848c0 4.4 3.6 8 8 8h60c4.4 0 8-3.6 8-8V509.7H624c6.7 0 10.4-7.7 6.3-12.9L518.3 355z"
+            />
+          </svg>
+        </span>
+      </div>
     </div>
   </div>
 </div>
@@ -594,7 +636,28 @@ exports[`ConfigProvider components BackTop configProvider componentSize middle 1
     >
       <div
         class="config-back-top-icon"
-      />
+      >
+        <span
+          aria-label="vertical-align-top"
+          class="anticon anticon-vertical-align-top"
+          role="img"
+        >
+          <svg
+            aria-hidden="true"
+            class=""
+            data-icon="vertical-align-top"
+            fill="currentColor"
+            focusable="false"
+            height="1em"
+            viewBox="64 64 896 896"
+            width="1em"
+          >
+            <path
+              d="M859.9 168H164.1c-4.5 0-8.1 3.6-8.1 8v60c0 4.4 3.6 8 8.1 8h695.8c4.5 0 8.1-3.6 8.1-8v-60c0-4.4-3.6-8-8.1-8zM518.3 355a8 8 0 00-12.6 0l-112 141.7a7.98 7.98 0 006.3 12.9h73.9V848c0 4.4 3.6 8 8 8h60c4.4 0 8-3.6 8-8V509.7H624c6.7 0 10.4-7.7 6.3-12.9L518.3 355z"
+            />
+          </svg>
+        </span>
+      </div>
     </div>
   </div>
 </div>
@@ -610,7 +673,28 @@ exports[`ConfigProvider components BackTop configProvider virtual and dropdownMa
     >
       <div
         class="ant-back-top-icon"
-      />
+      >
+        <span
+          aria-label="vertical-align-top"
+          class="anticon anticon-vertical-align-top"
+          role="img"
+        >
+          <svg
+            aria-hidden="true"
+            class=""
+            data-icon="vertical-align-top"
+            fill="currentColor"
+            focusable="false"
+            height="1em"
+            viewBox="64 64 896 896"
+            width="1em"
+          >
+            <path
+              d="M859.9 168H164.1c-4.5 0-8.1 3.6-8.1 8v60c0 4.4 3.6 8 8.1 8h695.8c4.5 0 8.1-3.6 8.1-8v-60c0-4.4-3.6-8-8.1-8zM518.3 355a8 8 0 00-12.6 0l-112 141.7a7.98 7.98 0 006.3 12.9h73.9V848c0 4.4 3.6 8 8 8h60c4.4 0 8-3.6 8-8V509.7H624c6.7 0 10.4-7.7 6.3-12.9L518.3 355z"
+            />
+          </svg>
+        </span>
+      </div>
     </div>
   </div>
 </div>
@@ -626,7 +710,28 @@ exports[`ConfigProvider components BackTop normal 1`] = `
     >
       <div
         class="ant-back-top-icon"
-      />
+      >
+        <span
+          aria-label="vertical-align-top"
+          class="anticon anticon-vertical-align-top"
+          role="img"
+        >
+          <svg
+            aria-hidden="true"
+            class=""
+            data-icon="vertical-align-top"
+            fill="currentColor"
+            focusable="false"
+            height="1em"
+            viewBox="64 64 896 896"
+            width="1em"
+          >
+            <path
+              d="M859.9 168H164.1c-4.5 0-8.1 3.6-8.1 8v60c0 4.4 3.6 8 8.1 8h695.8c4.5 0 8.1-3.6 8.1-8v-60c0-4.4-3.6-8-8.1-8zM518.3 355a8 8 0 00-12.6 0l-112 141.7a7.98 7.98 0 006.3 12.9h73.9V848c0 4.4 3.6 8 8 8h60c4.4 0 8-3.6 8-8V509.7H624c6.7 0 10.4-7.7 6.3-12.9L518.3 355z"
+            />
+          </svg>
+        </span>
+      </div>
     </div>
   </div>
 </div>
@@ -642,7 +747,28 @@ exports[`ConfigProvider components BackTop prefixCls 1`] = `
     >
       <div
         class="prefix-BackTop-icon"
-      />
+      >
+        <span
+          aria-label="vertical-align-top"
+          class="anticon anticon-vertical-align-top"
+          role="img"
+        >
+          <svg
+            aria-hidden="true"
+            class=""
+            data-icon="vertical-align-top"
+            fill="currentColor"
+            focusable="false"
+            height="1em"
+            viewBox="64 64 896 896"
+            width="1em"
+          >
+            <path
+              d="M859.9 168H164.1c-4.5 0-8.1 3.6-8.1 8v60c0 4.4 3.6 8 8.1 8h695.8c4.5 0 8.1-3.6 8.1-8v-60c0-4.4-3.6-8-8.1-8zM518.3 355a8 8 0 00-12.6 0l-112 141.7a7.98 7.98 0 006.3 12.9h73.9V848c0 4.4 3.6 8 8 8h60c4.4 0 8-3.6 8-8V509.7H624c6.7 0 10.4-7.7 6.3-12.9L518.3 355z"
+            />
+          </svg>
+        </span>
+      </div>
     </div>
   </div>
 </div>