perf[Login]: password input add caps tooltip (PanJiaChen#1845)

Author: mayunhai

src/views/login/index.vue

@@ -23,24 +23,28 @@
         />
       </el-form-item>
 
-      <el-form-item prop="password">
-        <span class="svg-container">
-          <svg-icon icon-class="password" />
-        </span>
-        <el-input
-          :key="passwordType"
-          ref="password"
-          v-model="loginForm.password"
-          :type="passwordType"
-          :placeholder="$t('login.password')"
-          name="password"
-          auto-complete="on"
-          @keyup.enter.native="handleLogin"
-        />
-        <span class="show-pwd" @click="showPwd">
-          <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
-        </span>
-      </el-form-item>
+      <el-tooltip v-model="capsTooltip" content="Caps lock is On" placement="right" manual>
+        <el-form-item prop="password">
+          <span class="svg-container">
+            <svg-icon icon-class="password" />
+          </span>
+          <el-input
+            :key="passwordType"
+            ref="password"
+            v-model="loginForm.password"
+            :type="passwordType"
+            :placeholder="$t('login.password')"
+            name="password"
+            auto-complete="on"
+            @keyup.native="checkCapslock"
+            @blur="capsTooltip = false"
+            @keyup.enter.native="handleLogin"
+          />
+          <span class="show-pwd" @click="showPwd">
+            <svg-icon :icon-class="passwordType === 'password' ? 'eye' : 'eye-open'" />
+          </span>
+        </el-form-item>
+      </el-tooltip>
 
       <el-button :loading="loading" type="primary" style="width:50%;margin-bottom:30px;" @click.native.prevent="handleLogin">
         {{ $t('login.logIn') }}
@@ -111,6 +115,7 @@ export default {
         password: [{ required: true, trigger: 'blur', validator: validatePassword }]
       },
       passwordType: 'password',
+      capsTooltip: false,
       loading: false,
       showDialog: false,
       redirect: undefined
@@ -138,6 +143,18 @@ export default {
     // window.removeEventListener('storage', this.afterQRScan)
   },
   methods: {
+    checkCapslock({ shiftKey, key } = {}) {
+      if (key && key.length === 1) {
+        if (shiftKey && (key >= 'a' && key <= 'z') || !shiftKey && (key >= 'A' && key <= 'Z')) {
+          this.capsTooltip = true
+        } else {
+          this.capsTooltip = false
+        }
+      }
+      if (key === 'CapsLock' && this.capsTooltip === true) {
+        this.capsTooltip = false
+      }
+    },
     showPwd() {
       if (this.passwordType === 'password') {
         this.passwordType = ''