Node[removed] giving tag names in lower case

问题:

I am iterating NodeList to get Node data, but while using Node.innerHTML i am getting the tag names in lowercase.

Actual Tags

<Panel><Label>test</Label></Panel>

giving as

<panel><label>test</label></panel>

I need these tags as it is. Is it possible to get it with regular expression? I am using it with dojo (is there any way in dojo?).

var xhrArgs = {
            url: "./user/"+Runtime.userName+"/ws/workspace/"+Workbench.getProject()+"/lib/custom/"+(first.type).replace(".","/")+".html",
            content: {},
            sync:true,
            load: function(data){
                var test = domConstruct.toDom(data);
                dojo.forEach(dojo.query("[id]",test),function(node){
                    domAttr.remove(node,"id");
                });
                var childEle = "";
                dojo.forEach(test.childNodes,function(node){
                    if(node.innerHTML){
                            childEle+=node.innerHTML;
                    }
                });
                command.add(new ModifyCommand(newWidget,{},childEle,context));
            }
    };

回答1:

You cannot count on .innerHTML preserving the exact nature of your original HTML. In fact, in some browsers, it's significantly different (though generates the same results) with different quotation, case, order of attributes, etc...

It is much better to not rely on the preservation of case and adjust your javascript to deal with uncertain case.

It is certainly possible to use a regular expression to do a case insensitive search (the "i" flag designates its searches as case insensitive), though it is generally much, much better to use direct DOM access/searching rather than innerHTML searching. You'd have to tell us more about what exactly you're trying to do before we could offer some code.

回答2:

It would take me a bit to figure that out with a regex, but you can use this:

    var str = '<panel><label>test</label></panel>';
    chars = str.split("");
    for (var i = 0; i < chars.length; i++) {
        if (chars[i] === '<' || chars[i] === '/') {
           chars[i + 1] = chars[i + 1].toUpperCase();
        }
    }
    str = chars.join("");

jsFiddle

I hope it helps.

回答3:

If you are trying to just capitalise the first character of the tag name, you can use:

var s = 'panel';
s.replace(/(^.)(.*)/,function(m, a, b){return a.toUpperCase() + b.toLowerCase()}); // Panel

Alternatively you can use string manipulation (probably more efficient than a regular expression):

s.charAt(0).toUpperCase() + s.substring(1).toLowerCase(); // Panel

The above will output any input string with the first character in upper case and everything else lower case.

回答4:

this is not thoroughly tested , and is highly inefficcient, but it worked quite quickly in the console: (also, it's jquery, but it can be converted to pure javascript/DOM easily)

in jsFiddle

function  tagString (element) {
    return $(element).
            clone().
            contents().
            remove().
            end()[0].
            outerHTML.
            replace(/(^<\s*\w)|(<\/\s*\w(?=\w*\s*>$))/g,
                    function (a) {
                        return a.
                               toUpperCase();
                    }).
            split(/(?=<\/\s*\w*\s*>$)/);
}

function capContents (element) {
    return $(element).
            contents().
            map(function () { 
                   return this.nodeType === 3 ? $(this).text() : capitalizeHTML(this);
            })
}

function capitalizeHTML (selector) {
    var e = $(selector).first();
    var wrap = tagString(e);
    return wrap[0] + capContents(e).toArray().join("") + wrap[1];
}

capitalizeHTML('body');

also, besides being a nice exercise (in my opinion), do you really need to do this?