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August 29, 2015 14:22
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I came up to a problem the other day where I had to do a sort of token replacement in html without removing/recompiling the html nodes. I was working in angular, so data attached to html nodes needed to be preserved in this process. Below is my initial attempt, which seems to work at a glance.
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| <div id="test-el"> | |
| <div>some testing text blah</div> | |
| <div>some testing <span>%replace%test span</span> text blah</div> | |
| <p>something %replace% something blah</p> | |
| </div> | |
| <div id="control"> | |
| <div>some testing text blah</div> | |
| <div>some testing <span>%replace%test span</span> text blah</div> | |
| <p>something %replace% something blah</p> | |
| </div> | |
| <script> | |
| var el = document.getElementById('test-el') | |
| var replacePatternInHtml = function(htmlEl, pattern, replacement) { | |
| var replaceToken = function(text) { | |
| var newSpan | |
| var str = text.textContent | |
| var strArr = str.split(pattern) | |
| var newArr = [document.createTextNode(strArr.shift())] | |
| while(strArr[0]){ | |
| newSpan = document.createElement('span'); | |
| newSpan.innerHTML = replacement | |
| newArr.push(newSpan) | |
| newArr.push(document.createTextNode(strArr.shift())) | |
| } | |
| return newArr; | |
| } | |
| var searchAndReplace = function(el) { | |
| var item, newItems; | |
| for(var i=0, l=el.childNodes.length; i < l; i++) { | |
| item = el.childNodes[i] | |
| if(item.nodeType == 3) { | |
| newItems = replaceToken(item) | |
| for(var ii=0, ll=newItems.length; ii < ll; ii++) { | |
| el.insertBefore(newItems[ii], item) | |
| } | |
| el.removeChild(item) | |
| } else { | |
| searchAndReplace(item) | |
| } | |
| } | |
| } | |
| searchAndReplace(htmlEl) | |
| } | |
| replacePatternInHtml(el, new RegExp("%replace%"), "[TEST REPLACE]") | |
| </script> |
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