JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://yunikki.com/wp-content/themes/simplicity-child/style.css">
<div class="article">
<h1 class="entry-title">授乳中乳頭に白い点を発見！白斑が痛い時の対処と飲んでくれないときは？</h1>  
</div>

<div class="article">
<h1 class="entry-title">授乳中乳頭に白い点を発見！白斑が痛い時の対処と飲んでくれないときは？白斑が痛い時の対処と飲んでくれないときは？白斑が痛い時の対処と飲んでくれないときは？</h1>  
</div>

<div class="article">
<h1 class="entry-title">授乳中乳頭に白い点を発見！</h1>  
</div>

CSS

.article h1::before {
    display: none;
}

.article h1 {
    display: flex;
    flex-flow: row wrap;
    justify-content: space-between;
    border: 1px solid #000;
    padding-left: 0;
    align-items: center;
}

.article h1 img {
    display: block;
}

.article h1 span {
    display: block;
    margin-left: 4px;
    flex: 1;
}

JavaScript

(function($){
	$(function(){
    	/*var h1_text = $(".article h1").text();
        $(".article h1").html("<span>"+h1_text+"</span>");
        $(".article h1").prepend("<img src='http://yunikki.com/wp-content/uploads/2015/10/h1-e1445990470486.png'>");*/
        
        $(".article h1").each(function(){
        	var h1_text = $(this).text();
            $(this)
                .html("<span>"+h1_text+"</span>")
            	.prepend("<img src='http://yunikki.com/wp-content/uploads/2015/10/h1-e1445990470486.png'/>");
            
        });
        
    });
})(jQuery);