What is the alt attribute in the img tag used for?

The alt attribute is a required property that specifies alt text when the image cannot be displayed.

The alt attribute can provide alternate information for an image if the user is unable to view it for the following reasons:

1. The network speed is too slow.

2. Error in src attribute.

3. The browser disables the image.

4. The user is using a screen reader.

The alt property of the tag specifies alt text to be used to display the content in the browser in place of the image if the image is not displayed or if the user disables the image display. This way, even if the image can't be displayed, the user can still see some information about what was missing. And for people with disabilities, alt attributes are often the only way they can understand the content of an image.

The alt attribute is used to prevent the current position from being prompted when the ** is invalid.

alt attribute is.

element, which gives alternate text for the image to be used when the image is not displayed.

The alt attribute provides alternative information when the user is unable to view the image for some reason (e.g., slow to open, error in the src attribute, or the user is using a screen reader).

Note: Internet Explorer's handling of the alt attribute is to display the alt attribute value as a tooltip when the mouse cursor hovers over the image. But according to the HTML spec, this is not the right way to do it.

Other browsers do this by displaying the value of the alt attribute when the image cannot be loaded.

alt attribute. usually mates".

style attribute, the latter attribute indicates that the mouse will become a hand shape when placed on **.

The answer is not true. When ** cannot be displayed, the text set in the alt attribute will be displayed at the current position.

As for the introduction text displayed when the mouse is moved on, this is added by the old version of IE itself, so as to cultivate the wrong habit of use. The correct text tag should use the title attribute.

The tag used to introduce **, adding this thing is very useful for it.

**The introduction text, generally introduced**.

The difference between the alt attribute and the title attribute is that the former will display its value when it cannot be loaded, while the title is the value displayed on the mouse stroke of the normal loading of the **, although alt also has the latter function, but it is only supported in the lower version of the IE browser, and the higher version and the standard browser do not support this function.

tool raw materials; device, browser.

1. Alt attributes.

2. The running result is as follows:

2. Title attribute.

1. The title attribute is the content displayed by the mouse stroke, ** as follows:

Shanghai Flower Port - Tulips" />

2. The operation effect is as follows:

The alt attribute is a prompt message displayed on the page when your**can't be loaded for some reason,It will be output directly in the place where it was originally loaded**,And the title attribute is to display a small prompt when you hover over the mouse**,The mouse is gone,It's a bit similar to jquery's hover,You can try it yourself,In addition,The vast majority of HTML tags support the title attribute,The title attribute is specifically for prompting information。

The difference between the alt attribute and the title attribute is that the former will only display its value when it cannot be loaded, while title is the value displayed on the mouse stroke of the normal loading of **, although alt also has the latter function, but it is only supported in the lower version of the IE browser, and the higher version and the standard browser do not support this.

functional. tool raw materials; device, browser.

1. Alt attributes.

2. The running result is as follows:

2. Title attribute.

1. The title attribute is the content displayed by the mouse stroke, ** as follows:

Shanghai Flower Port - Tulips" />

2. The operation effect is as follows: