I need to implement a function that is currently written in JavaScript into my Ruby on Rails controller (.rb). This function dynamically generates and fills a select element with optgroup options.
How can I convert this functionality into Ruby code? I'm specifically looking for alternatives to JavaScript methods like
document.createElement("optgroup");Below is the original JavaScript code:
enter function nbFct() {
var clipLists = ["Default", "Recent", "Sticky lists"];
var option1 = ["a", "b"];
var option2 = ["a", "x", "c"];
var option3 = ["f", "e", "c", "d"];
var listType = [];
var optionType = [];
for (var i = 0; i < clipLists.length; i++) {
// create dynamic optgroup from clipLists
listType[i] = document.createElement("optgroup");
listType[i].label = clipLists[i];
// alert(listType[i].label);
if(listType[i].label == "Default"){
for (var j = 0; j < option3.length; j++) {
// create options and attach to optgroups
optionType[j] = document.createElement("option");
optionType[j].value = option3[j];
// alert(optionType[j].value) ;
optionType[j].appendChild(document.createTextNode(option3[j]));
listType[i].appendChild(optionType[j]);
}
}
else if(listType[i].label == "Recent"){
for (var j = 0; j < option2.length; j++) {
// create options and attach to optgroups
optionType[j] = document.createElement("option");
optionType[j].value = option2[j];
// alert(optionType[j].value) ;
optionType[j].appendChild(document.createTextNode(option2[j]));
listType[i].appendChild(optionType[j]);
}
}
else{
for (var j = 0; j < option1.length; j++) {
// create options and attach to optgroups
optionType[j] = document.createElement("option");
optionType[j].value = option1[j];
// alert(optionType[j].value) ;
optionType[j].appendChild(document.createTextNode(option1[j]));
listType[i].appendChild(optionType[j]);
}
}
}
// set the default
optionType[1].selected = true;
// clear select menu and append optgroups
var selectMenu = document.getElementById("clipListOption");
while (selectMenu.hasChildNodes()) {
selectMenu.removeChild(selectMenu.firstChild);
}
for (var i = 0; i < clipLists.length; i++) {
if (listType[i].hasChildNodes()) { selectMenu.appendChild(listType[i]); }
}
}