


Why doesn't the parent container display scrollbars when the Canvas width overflows?
Apr 05, 2025 pm 10:03 PMFAQs and solutions for Canvas canvas overflowing the parent container and scroll bars do not display
When drawing with Canvas, you often encounter a layout problem: the parent container has overflow: auto
, and the scroll bar is displayed when the expected content exceeds the expected content, but the actual effect does not match the expected one. For example, when the width of the Canvas exceeds the parent container, the parent container will be expanded, and when the height exceeds the parent container, the scroll bar can be displayed normally. This article will conduct in-depth analysis of this issue and provide solutions.
Problem description:
A parent container sets width: 100%
, height: 100%
and overflow: auto
attributes. The setDimensions
method of Fabric.js is used internally to set the width and height of Canvas. When the Canvas height exceeds the parent container height, the vertical scroll bar is displayed normally; but when the Canvas width exceeds the parent container width, the parent container width will be extended, but the horizontal scroll bar will not appear. why is that?
Problem analysis and solutions:
The core of the problem is that the parent container width uses 100%
of the percentage. width: 100%
means that the parent container width will be adaptively adjusted according to its content (Canvas). When the Canvas width exceeds the expected width of the parent container, the parent container automatically expands the width to accommodate the Canvas, so there is no horizontal scroll bar.
Solution:
Set fixed width: Set a fixed width value for the parent container (for example
width: 800px
). In this way, when the Canvas width exceeds this fixed value, the parent container displays a horizontal scroll bar according tooverflow: auto
attribute.Use viewport width: Use
width: 100vw
. This way, the parent container width will always be consistent with the browser viewport width, ensuring that horizontal scroll bars can appear when the Canvas width exceeds the viewport width.
In short, the parent container must have a clear width that will not change dynamically according to the content in order to correctly achieve horizontal overflow scrolling. Only when the width of the parent container is fixed and the Canvas width exceeds this fixed width, overflow: auto
can effectively display the horizontal scroll bar.
The above is the detailed content of Why doesn't the parent container display scrollbars when the Canvas width overflows?. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undress AI Tool
Undress images for free

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Identifying the trend of the main capital can significantly improve the quality of investment decisions. Its core value lies in trend prediction, support/pressure position verification and sector rotation precursor; 1. Track the net inflow direction, trading ratio imbalance and market price order cluster through large-scale transaction data; 2. Use the on-chain giant whale address to analyze position changes, exchange inflows and position costs; 3. Capture derivative market signals such as futures open contracts, long-short position ratios and liquidated risk zones; in actual combat, trends are confirmed according to the four-step method: technical resonance, exchange flow, derivative indicators and market sentiment extreme value; the main force often adopts a three-step harvesting strategy: sweeping and manufacturing FOMO, KOL collaboratively shouting orders, and short-selling backhand shorting; novices should take risk aversion actions: when the main force's net outflow exceeds $15 million, reduce positions by 50%, and large-scale selling orders

The total amount of Bitcoin is 21 million, which is an unchangeable rule determined by algorithm design. 1. Through the proof of work mechanism and the issuance rule of half of every 210,000 blocks, the issuance of new coins decreased exponentially, and the additional issuance was finally stopped around 2140. 2. The total amount of 21 million is derived from summing the equal-scale sequence. The initial reward is 50 bitcoins. After each halving, the sum of the sum converges to 21 million. It is solidified by the code and cannot be tampered with. 3. Since its birth in 2009, all four halving events have significantly driven prices, verified the effectiveness of the scarcity mechanism and formed a global consensus. 4. Fixed total gives Bitcoin anti-inflation and digital yellow metallicity, with its market value exceeding US$2.1 trillion in 2025, becoming the fifth largest capital in the world

First, download the Binance App through the official channel to ensure security. 1. Android users should visit the official website, confirm that the URL is correct, download the Android installation package, and enable the "Allow to install applications from unknown sources" permission in the browser. It is recommended to close the permission after completing the installation. 2. Apple users need to use a non-mainland Apple ID (such as the United States or Hong Kong), log in to the ID in the App Store and search and download the official "Binance" application. After installation, you can switch back to the original Apple ID. 3. Be sure to enable two-factor verification (2FA) after downloading and keep the application updated to ensure account security. The entire process must be operated through official channels to avoid clicking unknown links.

The failure to register a Binance account is mainly caused by regional IP blockade, network abnormalities, KYC authentication failure, account duplication, device compatibility issues and system maintenance. 1. Use unrestricted regional nodes to ensure network stability; 2. Submit clear and complete certificate information and match nationality; 3. Register with unbound email address; 4. Clean the browser cache or replace the device; 5. Avoid maintenance periods and pay attention to the official announcement; 6. After registration, you can immediately enable 2FA, address whitelist and anti-phishing code, which can complete registration within 10 minutes and improve security by more than 90%, and finally build a compliance and security closed loop.

Binance Exchange is the world's leading cryptocurrency trading platform. The official website entrance is a designated link. Users need to access the website through the browser and pay attention to preventing phishing websites; 1. The main functions include spot trading, contract trading, financial products, Launchpad new currency issuance and NFT market; 2. To register an account, you need to fill in your email or mobile phone number and set a password. Security measures include enabling dual-factor authentication, binding your mobile email and withdrawal whitelist; 3. The APP can be downloaded through the official website or the app store. iOS users may need to switch regions or use TestFlight; 4. Customer support provides 24/7 multi-language services, and can obtain help through the help center, online chat or work order; 5. Notes include accessing only through official channels to prevent phishing

To register on the Ouyi web version, you must first visit the official website and click the "Register" button. 1. Select the registration method of mobile phone number, email or third-party account, 2. Fill in the corresponding information and set a strong password, 3. Enter the verification code, complete the human-computer verification and agree to the agreement, 4. After registration, bind two-factor authentication, set the capital password and complete KYC identity verification. Notes include that mainland Chinese users need to pay attention to regulatory policies and be vigilant to impersonate customer service. In 2024, new users must complete the basic KYC before they can trade. After the above steps are completed, you can use your account safely.

Bitcoin (BTC) is the world's first decentralized digital currency. Since its debut in 2009, it has become the leader in the digital asset market with its unique encryption technology and limited supply. For users who are following the cryptocurrency space, it is crucial to keep track of their price dynamics in real time.

Table of Contents Part 1: Stocks (ATM) Part 2: Debt (leverage) What is the growth path of a full-stack crypto reserve company? Where is the altcoin treasury reserve company? Summary?What is the goal of a Bitcoin treasury reserve company? It is to increase the proportion of Bitcoin per share, that is, the ratio between the total amount of Bitcoin held by the company and the number of shares completely diluted by the company. Microstrategy companies are not trying to seize opportunities and earn US dollar earnings through Bitcoin trading. Their only focus is on increasing Bitcoin per share (BPS) by increasing the proportion of Bitcoin per share in an increased way. We call
