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14,154 PointsCan somebody tell me what this function does?
Can somebody tell me what this function does? i dont understand list argument where it come from?
Playlist.prototype.renderInElement = function(list) {
list.innerHTML = "";
for(var i = 0; i < this.songs.length; i++) {
list.innerHTML += this.songs[i].toHTML();
}
};
2 Answers
Steven Parker
231,275 PointsThis function causes the list of songs to appear in the HTML document.
Since this is a method of a Playlist object, it will loop through the songs that are part of the playlist that it is called on. The playlist itself is represented inside the function as "this". Each song name will be converted to HTML and added to the document element that it is given as the argument ("list").
You can see it being demonstrated at about time index 04:40 of the Making the UI Work video.
The "list" argument passed to the function in the video is playlistElement, which was assigned by a call to document.GetElementById and refers to the ordered list (<ol>
) element on the page.
Ivan Sandoval
961 PointsBasically the renderInElement(list) method is the one who displays all the songs on the HTML document.
The argument that it receives represents this HTML element
<ol id="playlist">
</ol>
Now, from the documentation: The innerHTML property sets or returns the HTML content (inner HTML) of an element.
list.innerHTML = "";
And finally, in the for loop you're adding to this element each one of the songs represented as an HTML String
for(var i = 0; i < this.songs.length; i++) { list.innerHTML += this.songs[i].toHTML(); }