JavaScript vérifie si le tableau est vide
if (typeof array !== 'undefined' && array.length === 0) {
// the array is defined and has no elements
}
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if (typeof array !== 'undefined' && array.length === 0) {
// the array is defined and has no elements
}
if (array === undefined || array.length == 0) {
// array empty or does not exist
}
if (array && !array.length) {
// array is defined but has no element
}if(array.length > 0)var colors=[];
if(!colors.length){
// I am empty
}else{
// I am not empty
}if (typeof image_array !== 'undefined' && image_array.length > 0) {
// the array is defined and has at least one element
}