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Verify some Javascript code previous developer used with regards to increasing Page speed


I had a developer work on increasing the page speed score of our webpage and he added some javascript code that I have no idea what it is for. I need someone who has experience in this area to verify the code and explain what it is for and whether it is done correctly.

The code is at the bottom of the page and looks like this:


(function() {

var bootstrap = [login to view URL]('link');

var chat = [login to view URL]('link');

[login to view URL] = 'text/css';

[login to view URL] = 'text/css';

[login to view URL] = 'stylesheet';

[login to view URL] = 'stylesheet';

[login to view URL] = 'assets/css/[login to view URL]';

[login to view URL] = 'assets/css/[login to view URL]';

var bootstrapIns = [login to view URL]('link')[0];

var chatIns = [login to view URL]('link')[0];

[login to view URL](bootstrap, bootstrapIns);

[login to view URL](chat, chatIns);



- I understand that the purpose of this code is to inject the css after the page is loaded to help boost the page speed score. However, i want to know if its done correctly. Each line must be carefully examined.

Also the person i hire can also verify that the page is optimal coded HTML5, Bootstrap and CSS.

5 star review will be given for completion. Job should take less than 1 hour.


Kĩ năng: JavaScript, CSS, HTML5, Google PageSpeed Insights, Bootstrap

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Về Bên Thuê:
( 40 nhận xét ) Toronto, Canada

ID dự án: #25037785

Được trao cho:


Hello, this code is for inject CSS stylesheets after your HTML page is loaded I'm doing some tests to know its issues or if it do all work fine. But first let me start your project. Greetings

$5 USD / giờ
(2 Đánh Giá)

8 freelancer chào giá trung bình $9/giờ cho công việc này


Hello!! I have read your project description clearly and willing to work with you as i have massive experience in working with JavaScript/J query. I am JavaScript Developer having more then 5 years experience in javasc Thêm

$30 USD / giờ
(56 Nhận xét)

Hi, i have understood the script and can surely help you out in understanding the code Kindly message for further discussion

$5 USD / giờ
(10 Nhận xét)

Hi. Hope you are well. I think this code does not show down your site much. and the root cause is still on your site and it is something else.

$9 USD / giờ
(3 Nhận xét)

Hello Sir/Madam, We will do this job as per your expectation, We have more than 8 year of experience in Website Design & Development, UX Designing, UI Development, SEO & Mobile Application Development. We are the one Thêm

$5 USD / giờ
(5 Nhận xét)

Hi. This code you posted is simple as adding a styee sheet resource dynamically from js code. I will help you in understanding any other code. Let me know what you want to work on.

$10 USD / giờ
(4 Nhận xét)

Hi there, I'm a professional software developer and I have more than 5 year experience in IT field. I am highly skilled in HTML, HTML5 , CSS, CSS 3 , Jquery and Javascript. I like to do your job 100% accuracy and com Thêm

$5 USD / giờ
(1 Nhận xét)

Hello Greetings !! I have checked the project description that you are looking for a developer and designer to make some modifications over your website. Please share a detail list of all the modification you want u Thêm

$5 USD / giờ
(0 Nhận xét)