set el-tooltip content as a long string without white space
found that el-tooltip content is overflow the screen viewport range
What is Expected?
el-tooltip content will auto break
What is actually happening?
el-tooltip content is overflow the screen viewport range.
it should be related to the 'el-tooltip__popper' attr, i think you should set attr 'max-width: calc(100vw - 20px);' for it
rencoo
commented
2 years ago 
Element UI version
2.15.7
OS/Browsers version
macOS 12.0.1，Chrome 99.0.4844.83
Vue version
2.6.14
Reproduction Link
https://jsfiddle.net/rencoo/8ao7vz3k/6/
Steps to reproduce
What is Expected?
el-tooltip content will auto break
What is actually happening?
el-tooltip content is overflow the screen viewport range. it should be related to the 'el-tooltip__popper' attr, i think you should set attr 'max-width: calc(100vw - 20px);' for it