Javascript 如何正确地将UTF-8字符视为SVG参数？

我有一个SVG文件，其中包含我想通过参数设置的文本。我的HTML如下所示：

<object type="image/svg+xml" data="../src/img/road-map-header.svg?code=سلام"></object>

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1134.6 70.64" direction="rtl" xml:lang="ar">   
<title>Asset 2</title>
<g id="Layer_2" data-name="Layer 2">
    <g id="Layer_1-2" data-name="Layer 1">
        <text class="cls-1" transform="translate(913.98 39.02)" id="level-one">
            --parameter insert here--
        </text>
    </g>           
</g>
<script type="application/ecmascript"> <![CDATA[
        // when used as an object, we'll allow attributes to be changed by params passed in the query string
        var paramList = ['code'];
        var refs = [];
        var href = document.defaultView.location.href;
        if ( -1 != href.indexOf("?") ) {
            var paramList = href.split("?")[1].split(/&|;/);
            for ( var p = 0, pLen = paramList.length; pLen > p; p++ ) {
                var eachParam = paramList[ p ];
                var valList = eachParam.split("=");
                var name = unescape(valList[0]);
                var value = unescape(valList[1]);
                refs[name] = value;
            }
    }
    // do stuff with the params
    if(refs['code'] != undefined){
        document.getElementById("level-one").innerHTML = refs['code'];        
    }else{
        document.getElementById("errorcode").innerHTML = '!';
    }
    ]]>
</script>

我的svg文件如下所示：

<object type="image/svg+xml" data="../src/img/road-map-header.svg?code=سلام"></object>

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1134.6 70.64" direction="rtl" xml:lang="ar">   
<title>Asset 2</title>
<g id="Layer_2" data-name="Layer 2">
    <g id="Layer_1-2" data-name="Layer 1">
        <text class="cls-1" transform="translate(913.98 39.02)" id="level-one">
            --parameter insert here--
        </text>
    </g>           
</g>
<script type="application/ecmascript"> <![CDATA[
        // when used as an object, we'll allow attributes to be changed by params passed in the query string
        var paramList = ['code'];
        var refs = [];
        var href = document.defaultView.location.href;
        if ( -1 != href.indexOf("?") ) {
            var paramList = href.split("?")[1].split(/&|;/);
            for ( var p = 0, pLen = paramList.length; pLen > p; p++ ) {
                var eachParam = paramList[ p ];
                var valList = eachParam.split("=");
                var name = unescape(valList[0]);
                var value = unescape(valList[1]);
                refs[name] = value;
            }
    }
    // do stuff with the params
    if(refs['code'] != undefined){
        document.getElementById("level-one").innerHTML = refs['code'];        
    }else{
        document.getElementById("errorcode").innerHTML = '!';
    }
    ]]>
</script>

资产2
--在此处插入参数--
请将脚本标记替换为以下内容：

<script type="application/ecmascript"> <![CDATA[
function getParameterByName(name, url) {
    // Thanks to https://stackoverflow.com/questions/901115/how-can-i-get-query-string-values-in-javascript 
    if (!url) url = window.location.href;
    name = name.replace(/[\[\]]/g, '\\$&');
    var regex = new RegExp('[?&]' + name + '(=([^&#]*)|&|#|$)'),
        results = regex.exec(url);
    if (!results) return null;
    if (!results[2]) return '';
    return decodeURIComponent(results[2].replace(/\+/g, ' '));
}

var href = document.defaultView.location.href;
var code = getParameterByName('code', href);

if (code != undefined){
  document.getElementById("level-one").textContent = code;
} else {
  document.getElementById("errorcode").textContent = '!';
}
]]>
</script>



我必须承认，我不太喜欢SVG中的脚本标记，因此我自己也会以不同的方式处理它，但我发现上面的内容适用于阿拉伯语和汉语：

<object type="image/svg+xml" data="mysvg.svg?code=سلام"></object>

<object type="image/svg+xml" data="mysvg.svg?code=普通话"></object>