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vue special character escape

May 25, 2023 am 10:58 AM

在Vue开发中,我们可能会遇到一些特殊字符需要进行转义,否则会导致页面无法正常渲染或者存在安全问题。本文将介绍Vue中常见的特殊字符转义方法。

一、HTML转义

在Vue中,若是将动态数据渲染到HTML标签中,需要进行HTML转义。该转义方法通常使用{{}}直接嵌入Vue模板字符串中,Vue会自动进行转义。如下代码所示:

<div>{{ message }}</div>

若是需要手动进行HTML转义,可以使用Vue提供的$v-html指令,并搭配JavaScript的原生转义函数进行使用。

<div v-html="escapeHTML(message)"></div>
methods:{
    escapeHTML: function (html) {
        return html.replace(/&/g, '&')
                   .replace(/</g, '<')
                   .replace(/>/g, '>')
                   .replace(/"/g, '"')
                   .replace(/'/g, '&#x27;')
                   .replace(///g, '&#x2F;');
    }
}

二、属性值转义

在HTML属性中包含有一些特殊字符需要进行转义,如双引号、单引号、大于号、小于号等。在Vue中,可以使用v-bind指令进行属性绑定,在绑定值时与HTML转义类似,一般使用{{}}进行转义,Vue会自动进行转义。如下代码所示:

<button v-bind:title="message">{{ message }}</button>

若是需要手动进行属性值转义,可以使用Vue提供的$v-bind指令替代原有的直接属性绑定,搭配JavaScript的原生转义函数进行使用。

<button v-bind:title="escapeAttr(message)">{{ escapeAttr(message) }}</button>
methods:{
    escapeAttr: function (attr) {
        return attr.replace(/"/g, '"')
                   .replace(/'/g, '&#x27;');
    }
}

三、URL转义

在Vue中,若是将动态数据渲染到URL中,需要进行URL转义。在Vue中,可以使用JavaScript的原生encodeURI()、encodeURIComponent()函数进行URL编码。如下代码所示:

<a v-bind:href="encodeURIComponent(url)">{{ url }}</a>

在Vue中,若是将URL作为属性绑定时,同样需要进行URL转义。在Vue中,一般使用{{}}进行转义,Vue会自动进行转义。如下代码所示:

<img  v-bind:src="{{ url }}" alt="vue special character escape" >

需要注意的是,当URL包含特殊字符时(如&、#等),不要直接使用encodeURIComponent()进行编码,而是应该先将特殊字符进行替换,再进行编码。如下代码所示:

methods:{
    encodeUrl:function(url){
        return encodeURIComponent(url).replace(/%2B/g,'+')
                                      .replace(/%26/g,'&')
                                      .replace(/%3D/g,'=')
                                      .replace(/%3F/g,'?')
                                      .replace(/%2F/g,'/')
                                      .replace(/%23/g,'#')
                                      .replace(/%2C/g,',');
    }
}

四、CSS转义

在Vue中,如果需要将动态数据渲染到CSS中,需要进行CSS转义。在Vue中,建议使用JavaScript的原生escape()函数进行CSS编码。

<style>
.container { background: url('{{ escapeCSS(imageUrl) }}') }
</style>
methods:{
     escapeCSS: function(css){
        return escape(css);
     }
}

综上所述,本文介绍了Vue中常见的特殊字符转义方法,包括HTML转义、属性值转义、URL转义和CSS转义,希望以上内容能对Vue开发者有所帮助。

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