JSはCSSの3つの方式を修正しますか?

 

 

function clk(event) {
    var parent = document.getElementById("parent");
     
    //  className
    var child0 = document.createElement("div"); 
    child0.innerHTML = "child0";
    child0.className = "newDiv";
    parent.appendChild(child0);
    //  cssText
    var child1 = document.createElement("div");
    child1.innerHTML = "child1";
    child1.style.cssText = "font-weight: bold";
    parent.appendChild(child1);
    //      
    var child2 = document.createElement("div");
    child2.innerHTML = "child2";
    child2.style.fontWeight = "bold";
    parent.appendChild(child2);
}

 




    
child