尝试更改特定字母的背景颜色

Question

I want the javascript code to highlight the background colour for all 'a' and 'i' letters in the following two paragraph tags.

I also want the image tag to show correctly. I wasn't linking to an image file in this test so showing correctly just means showing the default image.

At one point i had this code working as expected but then when i tried it later it was no longer working. The only conclusion is i must have changed something but i don't know what.

Can anyone tell me why it doesn't work?

 document.querySelectorAll('p').forEach(function(myFirstItem, index) { container = '' zeroORone = 0 myFirstItem.innerHTML.split('').forEach(function(mySecondItem) { if (mySecondItem == 'a' & zeroORone == 0) { container += '<span class="yellow">' + mySecondItem + '</span>' } else if (mySecondItem == 'i' & zeroORone == 0) { container += '<span class="orange">' + mySecondItem + '</span>' } else if (mySecondItem == '<') { zeroORone = 1 container += mySecondItem } else if (mySecondItem == '>') { zeroORone = 0 container += mySecondItem } else { container += mySecondItem } }) myFirstItem.innerHTML = container }) 

 <p>piece of a puzzle</p> <p>Planet <img src="someImage.png"> Earth</p> 

Answer 1

I've made some changes to the HTML: I've wrapped the text in span elements. In the javascript I'm searching for the a and the i and I'm wrapping them in a <i> element. Please take a look:

 let spans = document.querySelectorAll('span') spans.forEach(s=>{ let text = s.innerHTML; text = text.replace(/([ai])/g, (found)=> { return `<i class='${found}'>${found}</i>` }); s.innerHTML = text; }) 

 ia{background:yellow} ii{background:orange} 

 <p><span>piece of a puzzle</span></p> <p><span>Planet</span> <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/222579/pin.png"> <span>Earth</span></p> 

Answer 2

Your code does work, except you have not added css for classes yellow and orange .

 document.querySelectorAll('p').forEach(function(myFirstItem, index) { container = '' zeroORone = 0 myFirstItem.innerHTML.split('').forEach(function(mySecondItem) { if (mySecondItem == 'a' && zeroORone == 0) { container += '<span class="yellow">' + mySecondItem + '</span>' } else if (mySecondItem == 'i' && zeroORone == 0) { container += '<span class="orange">' + mySecondItem + '</span>' } else if (mySecondItem == '<') { zeroORone = 1 container += mySecondItem } else if (mySecondItem == '>') { zeroORone = 0 container += mySecondItem } else { container += mySecondItem } }); myFirstItem.innerHTML = container }); 

 .yellow { background: yellow; } .orange { background: orange; } 

 <p>piece of a puzzle</p> <p>Planet <img src="someImage.png"> Earth</p>