特性：

1. 有密码强度颜色提示
2. 密码强度进度条提示
3. 支持设置默认输入提示和密码长度

 sgPasswordInput源码

<template>
  <div :class="$options.name" style="width: 100%">
    <el-input
      style="width: 100%"
      ref="psw"
      type="password"
      v-model="psw"
      show-password
      :maxlength="maxlength || 20"
      :show-word-limit="false"
      :placeholder="placeholder || `请输入6位以上的密码`"
      @focus="$refs.psw.select()"
      @change="change"
      clearable
    />
    <el-alert
      v-if="passwordStrength"
      style="width: 100%; margin-top: 5px"
      :closable="false"
      :close-text="``"
      :description="``"
      :effect="'light'"
      :show-icon="true"
      :title="passwordStrength.text"
      :type="passwordStrength.type"
    >
    </el-alert>
    <el-progress
      v-if="passwordStrength && passwordStrength.strength > 0"
      style="width: 100%; margin-top: 5px"
      type="line"
      :percentage="passwordStrength.strength"
      :show-text="false"
      :stroke-width="10"
      :text-inside="false"
      :color="passwordStrength.color"
      :define-back-color="'#eee'"
    />
  </div>
</template>
<script>
export default {
  name: "sgPasswordInput",
  data() {
    return {
      psw: "",
    };
  },
  props: ["value", "placeholder", "maxlength"],
  watch: {
    value: {
      handler(newValue, oldValue) {
        this.psw = newValue;
      },
      deep: true, //深度监听
      immediate: true, //立即执行
    },
    psw: {
      handler(newValue, oldValue) {
        this.$emit(`input`, newValue);
      },
      deep: true, //深度监听
      immediate: true, //立即执行
    },
  },
  computed: {
    passwordStrength() {
      let passwordStrength = this.checkPasswordStrength(this.psw);
      this.$emit(`passwordStrength`, passwordStrength);
      return passwordStrength;
    },
  },
  methods: {
    change(d) {
      this.$emit(`change`, d);
    },
    select(d) {
      this.$refs.psw.select();
    },
    //校验密码强度
    checkPasswordStrength(password) {
      if (!password) return null;
      let level = 0; //密码强度等级
      let preText = "密码需要包含";
      let containTexts = ["数字", "小写字母", "大写字母", "特殊字符"];
      let tipTexts = [];
      let r = {};
      /\d/.test(password) ? level++ : tipTexts.push(containTexts[0]); //包含数字
      /[a-z]/.test(password) ? level++ : tipTexts.push(containTexts[1]); //包含小写
      /[A-Z]/.test(password) ? level++ : tipTexts.push(containTexts[2]); //包含大写
      /\W/.test(password) ? level++ : tipTexts.push(containTexts[3]); //包含特殊字符
      password.length < 6 && (level = 0); //等级最弱
      switch (level) {
        case 0:
          r = {
            strength: 0,
            type: "error",
            color: "#F56C6C", //红色
            label: "不安全",
            text: `密码至少要6位`,
          };
          break;
        case 1:
          r = {
            strength: 25,
            type: "error",
            color: "#F56C6C", //红色
            label: "弱",
            text: `${preText}${tipTexts.join("、")}`,
          };
          break;
        case 2:
          r = {
            strength: 50,
            type: "warning",
            color: "#E6A23C", //橙色
            label: "一般",
            text: `${preText}${tipTexts.join("、")}`,
          };
          break;
        case 3:
          r = {
            strength: 75,
            type: "info",
            color: "#409EFF", //蓝色
            label: "较强",
            text: `${preText}${tipTexts.join("、")}`,
          };
          break;
        case 4:
          r = {
            strength: 100,
            type: "success",
            color: "#67C23A", //绿色
            label: "强",
            text: "密码安全度高",
          };
          break;
      }
      return r;
    },
  },
};
</script>
<style lang="scss" scoped>
.sgPasswordInput {
  >>> .el-alert {
    .el-alert__content {
      line-height: 1;
      .el-alert__title {
        margin-right: 0;
      }
    }
  }
}
</style>

 应用

<template>
  <div :class="$options.name">
    <div style="width: 400px">
      <sgPasswordInput
        v-model="psw"
        :placeholder="placeholder"
        :maxlength="20"
        @change="change"
        @passwordStrength="passwordStrength"
      />
    </div>
  </div>
</template>
<script>
import sgPasswordInput from "@/vue/components/admin/sgPasswordInput";
export default {
  name: "sgBody",
  components: { sgPasswordInput },
  data() {
    return {
      placeholder: "请输入强度高的密码",
      psw: "",
    };
  },
  methods: {
    change(d) {
      console.log(`change`, d);
    },
    passwordStrength(d) {
      console.log(`passwordStrength`, d);
    },
  },
};
</script>