Topic: Autocomplete with ajax request

Extarys pro asked 6 years ago

How should I implement the autocomplete feature with ajax request? I cannot pre-load it, too much data.   I'll actually use socketio instead of ajax but it will give the same result.   Thanks!

softcon premium answered 3 years ago

For anybody looking for an answer, it is possible to use Ajax to update the values of an autocomplete object in MDB. In the example below my Ajax response has filtered the result already, so javascript no longer handles that part (but you can add it in if required). The Ajax response returns a simple array of items based on the search text that was fed in. Also note, this is vanilla Javascript, no Jquery required:

 var xhr = new XMLHttpRequest();
 var isAjaxWaiting = false;
 var dataList = [];  //This will hold our updated data

//this function creates a delay 
const wait = ms=>new Promise(resolve => setTimeout(resolve, ms));

 //Init the search
 function initSearch(){
     const obj = document.querySelector('#search-autocomplete');       
     new mdb.Autocomplete(obj , {
         filter: getUpdatedData

 //send search text to ajax and keep looping until we have a response
 const getUpdatedData = async (txt)=>{ 
     if(txt!="" && !isAjaxWaiting){
             await wait(300);    //this forces a pause for 0.3 seconds - will loop if ajax hasnt returned yet
         } while(isAjaxWaiting)
         return dataList;        //Once do/while loop is broken out, return global dataList
         return [];

function sendDataToAjax(txt){
    isAjaxWaiting = true;"POST", "/ajaxurlhere", true);
    xhr.setRequestHeader("Content-Type", "application/json;charset=UTF-8");
         "searchtext" : txt

//Update global dataList when Ajax is returned
xhr.onreadystatechange = function () {     
      if (xhr.readyState === 4){             //4   = DONE
         dataList = JSON.parse(xhr.responseText);
         isAjaxWaiting = false;               // Our do/while loop will be able to break now

Marcin Luczak staff commented 3 years ago

Hi @softcon,

Thank you for this information, it will surely help our community :)

Regards, Marcin

Rafał Rogulski free answered 6 years ago

Hi, You must pass all data from socket .io to an array like in the example. When you catch all date you need initiate/reinitiate autocomplete field with code from example: Regards

Extarys pro commented 6 years ago

Thanks I'll try that.

pavan_kp free commented 4 years ago

Here is my code, I have to load the data when the user enters the data in the textbox. As we have lots of data in the database. we can't load complete data into the array.

Please insert min. 20 characters.


Hire our experts to build a dedicated project. We'll analyze your business requirements, for free.



Specification of the issue

  • ForumUser: Pro
  • Premium support: No
  • Technology: MDB jQuery
  • MDB Version: -
  • Device: -
  • Browser: -
  • OS: -
  • Provided sample code: No
  • Provided link: No