Getting value GET OR POST variable using JavaScript?

Question

How to get value of the get or post variable on page load using JavaScript?

Answer 1

With little php is very easy.

HTML part:

<input type="text" name="some_name">

JavaScript

<script type="text/javascript">
    some_variable = "<?php echo $_POST['some_name']?>";
</script>

Answer 2

// Captura datos usando metodo GET en la url colocar index.html?hola=chao
const $_GET = {};
const args = location.search.substr(1).split(/&/);
for (let i=0; i<args.length; ++i) {
    const tmp = args[i].split(/=/);
    if (tmp[0] != "") {
        $_GET[decodeURIComponent(tmp[0])] = decodeURIComponent(tmp.slice(1).join("").replace("+", " "));
        console.log(`>>${$_GET['hola']}`);
    }//::END if
}//::END for

Answer 3

The simplest technique:

If your form action attribute is omitted, you can send a form to the same HTML file without actually using a GET HTTP access, just by using onClick on the button used for submitting the form. Then the form fields are in the elements array document.FormName.elements . Each element in that array has a value attribute containing the string the user provided (For INPUT elements). It also has id and name attributes, containing the id and/or name provided in the form child elements.

Answer 4

This is my first Answer in stackoverflow and my english is not good. so I can't talk good about this problem:)

I think you might need the following code to get the value of your or tags.

this is what you might need:

HTML

<input id="input_id" type="checkbox/text/radio" value="mehrad" />

<div id="writeSomething"></div>

JavaScript

function checkvalue(input , Write) {
  var inputValue = document.getElementById(input).value;
  if(inputValue !="" && inputValue !=null) { 
    document.getElementById(Write).innerHTML = inputValue;
  } else { 
    document.getElementById(Write).innerHTML = "Value is empty";
  }
}

also, you can use other codes or other if in this function like this:

function checkvalue(input , Write) {
  var inputValue = document.getElementById(input).value;
  if(inputValue !="" && inputValue !=null) { 
    document.getElementById(Write).innerHTML = inputValue;
    document.getElementById(Write).style.color = "#000";
  } else {
    document.getElementById(Write).innerHTML = "Value is empty";
  }
}

and you can use this function in your page by events like this:

<div onclick="checkvalue('input_id','writeSomthing')"></div>

I hope my code will be useful for you

Write by <Mehrad Karampour>

Answer 5

You can only get the URI arguments with JavaScript.

// get query arguments
var $_GET = {},
    args = location.search.substr(1).split(/&/);
for (var i=0; i<args.length; ++i) {
    var tmp = args[i].split(/=/);
    if (tmp[0] != "") {
        $_GET[decodeURIComponent(tmp[0])] = decodeURIComponent(tmp.slice(1).join("").replace("+", " "));
    }
}

Answer 6

/**
* getGET: [Funcion que captura las variables pasados por GET]
* @Implementacion [pagina.html?id=10&pos=3]
* @param  {[const ]} loc           [capturamos la url]
* @return {[array]} get [Devuelve un array de clave=>valor]
*/
const getGET = () => {
    const loc = document.location.href;

            // si existe el interrogante
            if(loc.indexOf('?')>0){
            // cogemos la parte de la url que hay despues del interrogante
            const getString = loc.split('?')[1];
            // obtenemos un array con cada clave=valor
            const GET = getString.split('&');
            const get = {};

            // recorremos todo el array de valores
            for(let i = 0, l = GET.length; i < l; i++){
                const tmp = GET[i].split('=');
                get[tmp[0]] = unescape(decodeURI(tmp[1]));
            }//::END for
            return get;
        }//::END if 
}//::END getGET

/**
* [DOMContentLoaded]
* @param  {[const]} valores  [Cogemos los valores pasados por get]
* @return {[document.write]}       
*/
document.addEventListener('DOMContentLoaded', () => {
    const valores=getGET();

    if(valores){
            // hacemos un bucle para pasar por cada indice del array de valores
            for(const index in valores){
                document.write(`<br>clave: ${index} - valor: ${valores[index]}`);
            }//::END for
        }else{
            // no se ha recibido ningun parametro por GET
            document.write("<br>No se ha recibido ningún parámetro");
        }//::END if
});//::END DOMContentLoaded