仅当它在父div中时才使用innerHTML选择类

Question

i currently have the code below which searches for the class and will replace the text.

how would i tweak it so it only will replace text if the parent tag is "#thumb-hockey-top"?

window.onload = function(){
     //this captures all the elements with the spec classes
     var soldItems = document.getElementsByClassName('product-mark sold-out');

     //this changes each element 1 by 1 to new text
        for(var i=0; i<soldItems.length; i++){
           soldItems[i].innerHTML = "Coming Soon";
        }

}

Answer 1

 window.onload = function(){ //this captures all the elements with the spec classes //just use a class var soldItems = document.getElementsByClassName('sold-out'); //this changes each element 1 by 1 to new text //var parentnode = document.getElementById('thumb-hockey-top') for(var i=0; i<soldItems.length; i++){ if(soldItems[i].parentNode.id=='thumb-hockey-top'){ soldItems[i].innerHTML = "Coming Soon"; } } }; 

 <div id="thumb-hockey-top"> <div class="product-mark sold-out"></div> <div class="product-mark sold-out"></div> <div class="product-mark sold-out"></div> </div> 

Answer 2

You can get the parent element of an element using the parentElement attribute. Then just check its id.

var soldItem = soldItems[i];
if (soldItem.parentElement.id == "thumb-hockey-top") {
    // do your thing
}

Answer 3

Use once

 window.onload = function(){ //this captures all the elements with the spec classes var soldItems = document.getElementById("thumb-hockey-top").getElementsByClassName('product-mark sold-out'); //this changes each element 1 by 1 to new text for(var i=0; i<soldItems.length; i++){ soldItems[i].innerHTML = "Coming Soon" } } 

 <div id="thumb-hockey-top"> <div class="product-mark sold-out"></div> </div> <div class="product-mark sold-out"></div> <div class="product-mark sold-out"></div> 

Use multiple times

 function myF(a, b){ // a = Id of parent element // b = Class Name of element which you want to hack var soldItems = document.getElementById(a).getElementsByClassName(b); for(var i=0; i<soldItems.length; i++){ soldItems[i].innerHTML = "Coming Soon" } } myF("thumb-hockey-top", "product-mark sold-out"); myF("thumb-hockey-bottom", "product-unmark sold-out"); 

 <div class="example1"> <div id="thumb-hockey-top"> <div class="product-mark sold-out">EXAMPLE 1</div> </div> <div class="product-mark sold-out">EXAMPLE 1</div> </div> <div class="example2"> <div id="thumb-hockey-bottom"> <div class="product-unmark sold-out">EXAMPLE 2</div> </div> <div class="product-unmark sold-out">EXAMPLE 2</div> </div>