如何在Shiny的show_alert()中用\n实现多行文本显示？

你尝试用\n实现多行文本没生效，是因为sweetAlert的文本支持HTML渲染，普通换行符\n在HTML环境里不会被解析成换行，得用HTML的换行标签<br>替代。

以下是可行的写法：

• 直接写入<br>：text = "This data is....<br>Please, be careful with..."
• 用paste以<br>为分隔符拼接：text = paste("This data is....", "Please, be careful with...", sep="<br>")
• 用paste0拼接<br>：text = paste0("This data is....", "<br>", "Please, be careful with...")

完整测试代码示例：

library(shiny)
library(shinyWidgets)

ui <- fluidPage(
  actionButton("show_alert_btn", "显示多行提示框")
)

server <- function(input, output, session) {
  observeEvent(input$show_alert_btn, {
    # 用<br>实现换行
    show_alert(
      title = "提示",
      text = paste("This data is....", "Please, be careful with...", sep="<br>"),
      type = "warning"
    )
  })
}

shinyApp(ui, server)

内容的提问来源于stack exchange，提问作者emr2