How to get a HTML element by searching the content of innerHTML?
For example, Search
I want to get the "a" tag by searching word "Search" using javascript.
Thank you
var aTags = document.querySelectorAll('a');
var searchaTag = '';
for(i = 0; i<aTags.length; i++ ) {
if(aTags[i].text == 'Search') {
searchaTag = aTags[i];
break;
}
}
If you have no idea where the element can be, iterate over each element:
var all = document.querySelectorAll('*'); //OR document.getElementsByTagName("*")
for(var i = 0; i < all.length; i++ ) {
if(all[i].innerHTML === "search") {
console.log(all[i].tagName);
}
}
If you have some clue you can narrow your search by looking inside that area:
var all = document.querySelector('#my-Container').getElementsByTagName('*');
Related
I am trying to write a script that will convert all characters to lowercase if a particular nested style is applied. I can't seem to figure out the correct syntax to get the text.
I originally tried the following, which worked to an extend, but lowercased the entire paragraph rather than only the text that has the character style applied:
function lowerCaseNest(myPStyle, myCStyle){
var myDocument = app.documents.item(0);
//Clear the find/change preferences.
app.findTextPreferences = NothingEnum.nothing;
app.changeTextPreferences = NothingEnum.nothing;
//Set the find options.
app.findChangeTextOptions.caseSensitive = false;
app.findChangeTextOptions.includeFootnotes = false;
app.findChangeTextOptions.includeHiddenLayers = false;
app.findChangeTextOptions.includeLockedLayersForFind = false;
app.findChangeTextOptions.includeLockedStoriesForFind = false;
app.findChangeTextOptions.includeMasterPages = false;
app.findChangeTextOptions.wholeWord = false;
app.findTextPreferences.appliedParagraphStyle = myPStyle;
var missingFind = app.activeDocument.findText();
var myDoc = app.documents[0];
for ( var listIndex = 0 ; listIndex < missingFind.length; listIndex++ ) {
for (i = missingFind[listIndex].nestedStyles.length-1;i>=0; i--) {
for (j = missingFind[listIndex].nestedStyles[i].parent.characters.length-1;j>=0; j--) {
if (missingFind[listIndex].nestedStyles[i].parent.characters[j].contents.appliedCharacterStyle(myCStyle)) {
var myString = missingFind[listIndex].nestedStyles[i].parent.characters[j].contents;
if (typeof(myString) == "string"){
var myNewString = myString.toLowerCase();
missingFind[listIndex].nestedStyles[i].parent.characters[j].contents = myNewString;
}
}
}
}
app.findTextPreferences = NothingEnum.nothing;
app.changeTextPreferences = NothingEnum.nothing;
}
I then tried playing around with appliedNestedStyles, but can't seem to figure out how to retrieve the text that the nested style is applied to.
Could anyone help with this?
Thanks!
John
Unless I am wrong the appliedNestedStyle can be looked after in the F/C dialog by targeting the applied characterStyle:
GREP
Find : .+
Format : character style => myCharStyle
then
var found = doc.findGrep();
…
I actually took a different tack, and figured out something that works:
function lowerCaseNest(myPStyle, myCStyle){
for (var i = 0; i < app.activeDocument.stories.length; i++){
for (var j = 0; j < app.activeDocument.stories[i].paragraphs.length; j++){
var myP = app.activeDocument.stories[i].paragraphs[j];
if (myP.appliedParagraphStyle.name==myPStyle) {
for (k=0; k<myP.characters.length; k++) {
if(typeof(myP.characters[k].appliedNestedStyles[0]) != 'undefined'){
if(myP.characters[k].appliedNestedStyles[0].name == myCStyle) {
var myC = myP.characters[k].contents;
if (typeof(myC)=='string'){
var myNewString = myC.toLowerCase();
myP.characters[k].contents = myNewString;
}
}
}
}
}
}
}
}
Still would be interested in knowing if there's an easier way to handle this, as I'm afraid this may take longer to run on long documents, since it's dealing with every paragraph individually.
So I was able to find an specific table and I need to get no the text that's into the <b></b> of this table. Can't figure out how.
I'm using the following to test if I'm seeing my table correct:
var a = document.getElementsByTagName('table').length;
for (var i=0; i < a; i++)
{
b = document.getElementsByTagName("table")[i];
if (b.getAttribute("background") != null && b.getAttribute("background") == 'common/imgs/tabfade1.gif' ) { console.log(b.getAttribute("background")); }
}
result = true;
Any leads into how set my result as the text I need? Thanks in advance.
EDIT:
Image of the table.
Table Sample
document.querySelectorAll("table b")
Should give you a list of all <b> elements in all of the table elements.
Then you can peform your regular operations on them.
Well, in case someone else needs what I needed, here's what I've found as the solution:
var tables = document.getElementsByTagName('table');
var container = -1;
for (var i = 0; i < tables.length-1; i++) {
if (tables[i].background == "tabfade1.gif") {
container = i;
}
}
if (container > -1) {
result = tables[container].rows[0].cells[0].innerText.trim();
} else {
result = "";
}
I have a table and a button.
If i click the button, all <tr> which have an id starting with "tr" (in the example the first 3) should be set to display = "none";
Here is a Fiddle
Has anyone a Idea how i get this to work?
Give all the elements that have id="tr_NNNN" a distinct class, e.g. class="tr tr_NNNN". Then use the following loop:
var hide_trs = document.getElementsByClassName('tr_NNNN');
for (var i = 0; i < hide_trs.length; i++) {
hide_trs[i].style.display = "none";
}
You can simply iterate through your tr elements using the IDs:
function doJS() {
for(var i = 1; i <= 3; i ++) {
document.getElementById("tr_" + i).style.display="none";
}
}
You can't supply a wildcard to gEBI, but you can use the attribute starts with selector in qSA:
document.querySelectorAll("[id^='tr_']")[0].style.display="none";
I agree with using classes instead of IDs for this, but this should satisfy your original question:
function doJS() {
var rows = document.getElementsByTagName("tr");
for (var i = 0; i < rows.length; i++) {
var row = rows[i];
if(row.getAttribute("id") && /^tr/.test(row.getAttribute("id"))){
row.style.display = 'none';
}
}
}
http://jsfiddle.net/eHSwJ/14/
And while this isn't a jQuery question, I would point out that by leveraging jQuery, this can be reduced to:
$('tr[id^="tr"]').css('display', 'none');
I need to change the content of all "h1" tags in my html file when the page load using javascript.
So I write the following code
window.onload = function () {
var h1html = document.createElement("h1");
var h1htmltext = document.createTextNode("header 1");
h1html.appendChild(h1htmltext);
document.getElementsByTagName("h1").appendChild(h1html);
};
If you're sure you only have one h1 tag you could simply do
window.onload = function () {
document.getElementsByTagName("h1")[0].innerHTML = "header 1";
}
if multiple h1 tags are present you could do
window.onload = function () {
var h1Elems = document.getElementsByTagName("h1");
var pos;
for (pos in h1Elems) {
h1Elems[pos].innerHTML = "header 1";
}
}
Use this:
for(var i = 0, elems = document.getElementsByTagName('h1'); i < elems.length; i++) {
elems[i].innerHTML = "new";
}
fiddle
You need to change the innerHTML of each elements, as such
function changeall(){
var headers=document.getElementsByTagName("h1");
var newheadertext="hello";
for(var i in headers){
headers[i].innerHTML=newheadertext;
}
}
getElementsByTagName returns a node list; you need to loop through it.
var headers = document.getElementsByTagName("h1");
for(var i = 0; i < headers.length; i++) {
var header = headers[i];
var text = document.createTextNode("header 1");
while(header.childNodes.length) {
header.removeChild(header.firstChild);
}
header.appendChild(text);
}
I made a few assumptions there:
You don’t actually want to nest headers
You want to replace the content
You want an old-standards-compliant way
If you don’t need support for old browsers, just use textContent:
var headers = document.getElementsByTagName("h1");
for(var i = 0; i < headers.length; i++) {
headers[i].textContent = "header 1";
}
What I'm trying to accomplish with this code is to output the array alphabet as a series of list items into an existing unordered list in the actual markup. I've got the array into list items, but I can't figure out how to tell it to append itself to an existing unordered list <ul id="itemList"></ul>.
var itemsExist = true;
var indexNum = 0;
var unorderedList = document.getElementById('itemList');
var alphabet= new Array("A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z");
function write_letters(){
for (i = 0; i < alphabet.length; i++ ) {
document.write('<li>' + alphabet[indexNum++] + '</li>');
}
}
if (itemsExist){
write_letters();
} else {
document.write("error!");
}
Don't use document.write to do it. You should act like this:
function write_letters(){
var letters = "";
for (var i = 0; i < alphabet.length; i++ ) {
//Also I don't understand the purpose of the indexNum variable.
//letters += "<li>" + alphabet[indexNum++] + "</li>";
letters += "<li>" + alphabet[i] + "</li>";
}
document.getElementById("itemList").innerHTML = letters;
}
More proper way is to use DOM (in case you want full control of what's coming on):
function write_letters(){
var items = document.getElementById("itemList");
for (var i = 0; i < alphabet.length; i++ ) {
var item = document.createElement("li");
item.innerHTML = alphabet[i];
items.appendChild(item);
}
}
You can use a combination of createElement() and appendChild() to add new HTML elements within another HTML element. The code below should work for you:
<html>
<head>
<title>Script Test</title>
</head>
<body>
<ul id="itemList"></ul>
</body>
<script>
var itemsExist = true;
var indexNum = 0;
var unorderedList = document.getElementById('itemList');
var alphabet= new Array("A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z");
var myElement;
function write_letters(){
for (i = 0; i < alphabet.length; i++ ) {
// Create the <LI> element
myElement = document.createElement("LI");
// Add the letter between the <LI> tags
myElement.innerHTML = alphabet[indexNum++];
// Append the <LI> to the bottom of the <UL> element
unorderedList.appendChild(myElement);
}
}
if (itemsExist){
write_letters();
} else {
document.write("error!");
}
</script>
</html>
Note how the script exists below the body tag. This is important if you want your script to work the way you wrote it. Otherwise document.getElementById('itemList') will not find the 'itemList' ID.
Try to reduce the actions on the DOM as much as possible. Every appendChild on unorderedList forces the browser to re-render the complete page. Use documentFragement for that sort of action.
var frag = document.createDocumentFragment();
for (var i = alphabet.length; i--; ) {
var li = document.createElement("li");
li.appendChild(document.createTextNode(alphabet[indexNum++]));
frag.appendChild(li);
}
unorderedList.appendChild(frag);
So there will be only one DOM action which forces a complete redraw instead of alphabet.length redraws