VueJS2 v-html 带过滤器
VueJS2 v-html with filter
如何使用过滤器显示原始 html?
我有这样的东西:
K.json = function( json ) {
if( typeof json!='string' ) json = JSON.stringify( json, null, 2 );
json = json.replace( /</g, '<' ).replace( />/g, '>' ); // replace(/&/g, '&')
var pattern = /("(\u[a-zA-Z0-9]{4}|\[^u]|[^\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?)/g;
var html = json.replace( pattern, function( match ) {
var cls = 'number';
var suffix = '';
if( /^"/.test( match ) ) {
if( /:$/.test( match ) ) {
cls = 'key';
match = match.slice( 0, -1 );
suffix = ':'
} else {
cls = 'string';
}
} else if( /true|false/.test( match ) ) {
cls = 'boolean';
} else if( /null/.test( match ) ) {
cls = 'null';
}
return '<span class="' + cls + '">' + match + '</span>' + suffix;
} );
return html;
};
Vue.filter( 'json', K.json );
并像这样使用它们:
<div v-html="thecolumn | json"></div>
显示警告并显示错误:
vue.js:523 [Vue warn]: Property or method "json" is not defined on the instance but referenced during render. Make sure to declare reactive data properties in the data option.
(在根实例中找到)
我也试过论坛的解决方案:https://laracasts.com/discuss/channels/vue/use-a-filter-custom-filter-in-v-html-property?page=1
<p v-html="this.$options.filters.json(description)"></p>
显示错误:
[Vue warn]: Error when rendering root instance:
vue.js:3063 Uncaught TypeError: Cannot read property 'filters' of undefined
at eval (eval at makeFunction (vue.js:8260), <anonymous>:2:2975)
at Proxy.renderList (vue.js:3158)
at Proxy.eval (eval at makeFunction (vue.js:8260), <anonymous>:2:2169)
at Vue.Vue._render (vue.js:3054)
at Vue.<anonymous> (vue.js:2430)
at Watcher.get (vue.js:1661)
at new Watcher (vue.js:1653)
at Vue.Vue._mount (vue.js:2429)
at Vue.$mount (vue.js:6000)
at Vue.$mount (vue.js:8327)
在 VueJS2 上执行此操作的正确方法是什么?
问题是您的 HTML 在过滤器添加到您的 Vue 实例之前被处理。试试这样:
JSFiddle
var jsonFormatter = function(json){
if( typeof json!='string' ) json = JSON.stringify( json, null, 2 );
json = json.replace( /</g, '<' ).replace( />/g, '>' ); // replace(/&/g, '&')
var pattern = /("(\u[a-zA-Z0-9]{4}|\[^u]|[^\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?)/g;
var html = json.replace( pattern, function( match ) {
var cls = 'number';
var suffix = '';
if( /^"/.test( match ) ) {
if( /:$/.test( match ) ) {
cls = 'key';
match = match.slice( 0, -1 );
suffix = ':'
} else {
cls = 'string';
}
} else if( /true|false/.test( match ) ) {
cls = 'boolean';
} else if( /null/.test( match ) ) {
cls = 'null';
}
return '<span class="' + cls + '">' + match + '</span>' + suffix;
} );
return html;
}
new Vue({
el: '#app',
data(){
return {
jsonData: {dog: 'woof', nestedObject: {cat: 'meow'}}
}
},
filters: {
jsonFormatter: jsonFormatter
}
});
//Vue.filter( 'jsonFormatter', jsonFormatter ); // Doesn't work becuase happens after html is processed
<div id="app" class="container">
<h1>
v-html directive
</h1>
<div v-html="this.$options.filters.jsonFormatter(jsonData)"></div>
</div>
如果您只是显示数据,请创建一个方法:
json(jsonable) {
return jsonedValue;
}
然后在 html
<div v-html="json(mydata)"></div>
为了完整起见,您有一些选择,例如:
v-html="$options.filters.FILTERNAME(args)"
或
:inner-html.prop="args | FILTERNAME"
或
v-html="METHODNAME(args)"
,如果你创建一个方法。
请参阅下面的演示。
function json(text) {
// do your magic
return text.toUpperCase(); // just for demo
}
Vue.filter('json', function (value) {
return json(value);
})
new Vue({
el: '#app',
data: {
message: 'Hello Vue.js!'
},
methods: {
jsonMethod(v) {
return json(v); // create a "proxy" to the outer function
}
}
})
<script src="https://unpkg.com/vue"></script>
<div id="app">
<p v-html="$options.filters.json(message)"></p>
<p :inner-html.prop="message | json"></p>
<p v-html="jsonMethod(message)"></p>
</div>
对我来说,正如@acdcjunior 指出的那样,这很有效:
<p v-html="$options.filters.json(description)"></p>
除此之外,我有两个过滤器要应用,而且它也有效:
<p v-html="$options.filters.filter1($options.filters.filter2(description))"></p>
如何使用过滤器显示原始 html?
我有这样的东西:
K.json = function( json ) {
if( typeof json!='string' ) json = JSON.stringify( json, null, 2 );
json = json.replace( /</g, '<' ).replace( />/g, '>' ); // replace(/&/g, '&')
var pattern = /("(\u[a-zA-Z0-9]{4}|\[^u]|[^\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?)/g;
var html = json.replace( pattern, function( match ) {
var cls = 'number';
var suffix = '';
if( /^"/.test( match ) ) {
if( /:$/.test( match ) ) {
cls = 'key';
match = match.slice( 0, -1 );
suffix = ':'
} else {
cls = 'string';
}
} else if( /true|false/.test( match ) ) {
cls = 'boolean';
} else if( /null/.test( match ) ) {
cls = 'null';
}
return '<span class="' + cls + '">' + match + '</span>' + suffix;
} );
return html;
};
Vue.filter( 'json', K.json );
并像这样使用它们:
<div v-html="thecolumn | json"></div>
显示警告并显示错误:
vue.js:523 [Vue warn]: Property or method "json" is not defined on the instance but referenced during render. Make sure to declare reactive data properties in the data option.
(在根实例中找到)
我也试过论坛的解决方案:https://laracasts.com/discuss/channels/vue/use-a-filter-custom-filter-in-v-html-property?page=1
<p v-html="this.$options.filters.json(description)"></p>
显示错误:
[Vue warn]: Error when rendering root instance:
vue.js:3063 Uncaught TypeError: Cannot read property 'filters' of undefined
at eval (eval at makeFunction (vue.js:8260), <anonymous>:2:2975)
at Proxy.renderList (vue.js:3158)
at Proxy.eval (eval at makeFunction (vue.js:8260), <anonymous>:2:2169)
at Vue.Vue._render (vue.js:3054)
at Vue.<anonymous> (vue.js:2430)
at Watcher.get (vue.js:1661)
at new Watcher (vue.js:1653)
at Vue.Vue._mount (vue.js:2429)
at Vue.$mount (vue.js:6000)
at Vue.$mount (vue.js:8327)
在 VueJS2 上执行此操作的正确方法是什么?
问题是您的 HTML 在过滤器添加到您的 Vue 实例之前被处理。试试这样: JSFiddle
var jsonFormatter = function(json){
if( typeof json!='string' ) json = JSON.stringify( json, null, 2 );
json = json.replace( /</g, '<' ).replace( />/g, '>' ); // replace(/&/g, '&')
var pattern = /("(\u[a-zA-Z0-9]{4}|\[^u]|[^\"])*"(\s*:)?|\b(true|false|null)\b|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?)/g;
var html = json.replace( pattern, function( match ) {
var cls = 'number';
var suffix = '';
if( /^"/.test( match ) ) {
if( /:$/.test( match ) ) {
cls = 'key';
match = match.slice( 0, -1 );
suffix = ':'
} else {
cls = 'string';
}
} else if( /true|false/.test( match ) ) {
cls = 'boolean';
} else if( /null/.test( match ) ) {
cls = 'null';
}
return '<span class="' + cls + '">' + match + '</span>' + suffix;
} );
return html;
}
new Vue({
el: '#app',
data(){
return {
jsonData: {dog: 'woof', nestedObject: {cat: 'meow'}}
}
},
filters: {
jsonFormatter: jsonFormatter
}
});
//Vue.filter( 'jsonFormatter', jsonFormatter ); // Doesn't work becuase happens after html is processed
<div id="app" class="container">
<h1>
v-html directive
</h1>
<div v-html="this.$options.filters.jsonFormatter(jsonData)"></div>
</div>
如果您只是显示数据,请创建一个方法:
json(jsonable) {
return jsonedValue;
}
然后在 html
<div v-html="json(mydata)"></div>
为了完整起见,您有一些选择,例如:
v-html="$options.filters.FILTERNAME(args)"
或:inner-html.prop="args | FILTERNAME"
或v-html="METHODNAME(args)"
,如果你创建一个方法。
请参阅下面的演示。
function json(text) {
// do your magic
return text.toUpperCase(); // just for demo
}
Vue.filter('json', function (value) {
return json(value);
})
new Vue({
el: '#app',
data: {
message: 'Hello Vue.js!'
},
methods: {
jsonMethod(v) {
return json(v); // create a "proxy" to the outer function
}
}
})
<script src="https://unpkg.com/vue"></script>
<div id="app">
<p v-html="$options.filters.json(message)"></p>
<p :inner-html.prop="message | json"></p>
<p v-html="jsonMethod(message)"></p>
</div>
对我来说,正如@acdcjunior 指出的那样,这很有效:
<p v-html="$options.filters.json(description)"></p>
除此之外,我有两个过滤器要应用,而且它也有效:
<p v-html="$options.filters.filter1($options.filters.filter2(description))"></p>