1. 自定义需要的样式js文件

// stateColor.js
export default {
    mounted(el, binding) {
        setStyle(el, binding.value)
    },
    updated(el, binding) {
        setStyle(el, binding.value)
    }
}

function setStyle(el, stateCd) {
    const cd = Number(stateCd)

    if ([4, 7].includes(cd)) {
        el.style.color = 'red'
        el.style.fontWeight = 'bold'
        // 可扩展其它样式
        // el.style.fontSize = '14px'
        // el.style.textDecoration = 'underline'
    } else if (cd == 3) {
        el.style.color = 'blue'
        el.style.fontWeight = 'normal'
    } else {
        el.style.color = 'gray'
        el.style.fontWeight = 'normal'
    }
}

2. main.js注册

import stateColor from '~/composables/stateColor' // 引用
 

const app = createApp(App);
(async () => {

    app.directive('state-color', stateColor);

    app.mount('#app');
})();

3.在vue文件中运用

<template>
    <div v-state-color="item.PRO_STATE_CD"> 哈哈哈 </div>
</template>

4.效果：