DavidInLove
asked on
How to load big data step by step using ajax in jquery
Hello,
I will try to explain my prolblem:
In my website I load some big data for 3 canvas.
If I load the three, it is long and I need firstly only one.
So my first solution I did isn't good.
....
That is why my idea is to do that loading only the first:
and
decomposing the loading in another place
But it is still very long.
I believed that an ajax being executed on the server
this would not interact with the creation of the DOM on fly.
My question is the following:
How to load data step by step when they are needed
without stopping the display of all the process before any data are loaded?
Thanks David
I will try to explain my prolblem:
In my website I load some big data for 3 canvas.
If I load the three, it is long and I need firstly only one.
So my first solution I did isn't good.
$.when (
$.ajax({url:"load.php"})
.done ( function (data)
{
responsive_INTRODUCTION();
}),
$.getJSON(url0, function (data) {
str_r=data.paragraphes[0].split("-");
str_g=data.paragraphes[1].split("-");
str_b=data.paragraphes[2].split("-");
})
,
$.getJSON(url1, function (data) {
str1_r=data.paragraphes[0].split("-");
str1_g=data.paragraphes[1].split("-");
str1_b=data.paragraphes[2].split("-");
})
,
$.getJSON(url2, function (data) {
str2_r=data.paragraphes[0].split("-");
str2_g=data.paragraphes[1].split("-");
str2_b=data.paragraphes[2].split("-");
})
).always (function()
{
for (var i=0;i<str_r.length;i++)
{
pixout2[i*4 ] = str_r[i];
pixout2[i*4 +1 ] = str_g[i];
pixout2[i*4 +2 ] = str_b[i];
pixout2[i*4 +3 ] = 255;
}
contextout2.putImageData(imgdout2, 0, 0);
animate_BRANDING();
});
....
That is why my idea is to do that loading only the first:
$.when (
$.ajax({url:"load.php"})
.done ( function (data)
{
responsive_INTRODUCTION();
}),
$.getJSON(url0, function (data) {
str_r=data.paragraphes[0].split("-");
str_g=data.paragraphes[1].split("-");
str_b=data.paragraphes[2].split("-");
})
).always (function()
{
for (var i=0;i<str_r.length;i++)
{
pixout2[i*4 ] = str_r[i];
pixout2[i*4 +1 ] = str_g[i];
pixout2[i*4 +2 ] = str_b[i];
pixout2[i*4 +3 ] = 255;
}
contextout2.putImageData(imgdout2, 0, 0);
animate_BRANDING();
});
and
decomposing the loading in another place
$(document).ready( function () {
var time_delta=500;
var cpt=0;
var int1=setInterval( function() {
cpt++;
if (cpt==1)
{
$.getJSON(url1, function (data) {
str1_r=data.paragraphes[0].split("-");
str1_g=data.paragraphes[1].split("-");
str1_b=data.paragraphes[2].split("-");
run_str1=1;
});
}
else if (cpt==2)
{
$.getJSON(url2, function (data) {
str2_r=data.paragraphes[0].split("-");
str2_g=data.paragraphes[1].split("-");
str2_b=data.paragraphes[2].split("-");
run_str2=1;
});
}
else {clearInterval(int1);}
},time_delta);
But it is still very long.
I believed that an ajax being executed on the server
this would not interact with the creation of the DOM on fly.
My question is the following:
How to load data step by step when they are needed
without stopping the display of all the process before any data are loaded?
Thanks David
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ASKER
Yes of course callback functions are aften the solution!
Thanks really a lot for this beautifull solution I have adaptate to
my JS.
See you David