Tools & Wizards About Us

Report Summary

  • 1

    Performance

    Renders faster than
    19% of other websites

  • 80

    Accessibility

    Visual factors better than
    that of 49% of websites

  • 92

    Best Practices

    More advanced features
    available than in
    80% of websites

  • 82

    SEO

    Google-friendlier than
    44% of websites

book.com.tw

歡迎光臨博客來

Page Load Speed

11.7 sec in total

First Response

486 ms

Resources Loaded

7.5 sec

Page Rendered

3.7 sec

About Website

Visit book.com.tw now to see the best up-to-date Book content for Taiwan and also check out these interesting facts you probably never knew about book.com.tw

博客來提供上百萬書籍、百貨、影音、設計、文具、美食、有機、美妝、服飾。網路書店有齊全的繁簡體外文書籍雜誌，購物網多樣性百貨設計商品滿足您購物需求。取貨安全方便，中午前訂7-11隔日取

Visit book.com.tw

Key Findings

We analyzed Book.com.tw page load time and found that the first response time was 486 ms and then it took 11.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

book.com.tw performance score

1

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value6.6 s

2/100

10%

LCP (Largest Contentful Paint)

Value76.6 s

0/100

25%

SI (Speed Index)

Value33.0 s

0/100

10%

TBT (Total Blocking Time)

Value3,440 ms

2/100

30%

CLS (Cumulative Layout Shift)

Value1.03

2/100

15%

TTI (Time to Interactive)

Value77.8 s

0/100

10%

Network Requests Diagram

book.com.tw

486 ms

www.books.com.tw

1329 ms

css.css

90 ms

icon_01.css

96 ms

jquery-3.7.1.min.js

97 ms

Our browser made a total of 960 requests to load all elements on the main page. We found that 0% of them (1 request) were addressed to the original Book.com.tw, 46% (442 requests) were made to Im1.book.com.tw and 43% (413 requests) were made to Im2.book.com.tw. The less responsive or slowest element that took the longest time to load (2 sec) relates to the external source Mercury.books.com.tw.

Page Optimization Overview & Recommendations

Page size can be reduced by 589.8 kB (44%)

Content Size

1.3 MB

After Optimization

736.7 kB

  • HTML
  • Images
  • JavaScript
  • CSS

In fact, the total size of Book.com.tw main page is 1.3 MB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. Only a small number of websites need less resources to load. HTML takes 622.3 kB which makes up the majority of the site volume.

HTML Optimization

-87%

Potential reduce by 543.6 kB

  • Original 622.3 kB
  • After minification 621.0 kB
  • After compression 78.7 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. HTML code on this page is well minified. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 543.6 kB or 87% of the original size.

Image Optimization

-2%

Potential reduce by 6.0 kB

  • Original 296.7 kB
  • After minification 290.7 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Book images are well optimized though.

JavaScript Optimization

-11%

Potential reduce by 33.2 kB

  • Original 294.0 kB
  • After minification 293.9 kB
  • After compression 260.7 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 33.2 kB or 11% of the original size.

CSS Optimization

-6%

Potential reduce by 7.0 kB

  • Original 113.5 kB
  • After minification 113.5 kB
  • After compression 106.5 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Book.com.tw has all CSS files already compressed.

Requests Breakdown

Number of requests can be reduced by 65 (7%)

Requests Now

955

After Optimization

890

  • AJAX
  • Images
  • JavaScript
  • CSS

The browser has sent 955 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Book. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 37 to 1 for JavaScripts and from 8 to 1 for CSS and as a result speed up the page load time.

Network Requests Diagram

Accessibility Review

book.com.tw accessibility score

80

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Navigation

These are opportunities to improve keyboard navigation in your application.

Impact

Issue

High

[id] attributes on active, focusable elements are not unique

High

Heading elements are not in a sequentially-descending order

Internationalization and localization

These are opportunities to improve the interpretation of your content by users in different locales.

Impact

Issue

High

<html> element does not have a [lang] attribute

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

High

Links do not have a discernible name

Best practices

These items highlight common accessibility best practices.

Impact

Issue

High

[user-scalable="no"] is used in the <meta name="viewport"> element or the [maximum-scale] attribute is less than 5.

Best Practices

book.com.tw best practices score

92

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

High

Page has valid source maps

SEO Factors

book.com.tw SEO score

82

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    JA

  • Language Claimed

    ZH

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Book.com.tw can be misinterpreted by Google and other search engines. Our service has detected that Japanese is used on the page, and it does not match the claimed Chinese language. Our system also found out that Book.com.tw main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph description is not detected on the main page of Book. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: