在Bootstrap网站上找不到.img-responsive

Question

我正在通过以下教程学习bootstrap。我试图从

中了解有关d <- data.frame(y = rnorm(50)) d$x1 <- rnorm(50, d$y) d$x2 <- rnorm(50, d$y) train_control <- caret::trainControl(method = "cv", number = 4, search = "random", savePredictions = "final") m <- caret::train(x = d[, -1], y = d$y, method = "ranger", trControl = train_control, tuneLength = 3) #> Loading required package: lattice #> Loading required package: ggplot2 m #> Random Forest #> #> 50 samples #> 2 predictor #> #> No pre-processing #> Resampling: Cross-Validated (4 fold) #> Summary of sample sizes: 38, 36, 38, 38 #> Resampling results across tuning parameters: #> #> min.node.size mtry splitrule RMSE Rsquared MAE #> 1 2 maxstat 0.5981673 0.6724245 0.4993722 #> 3 1 extratrees 0.5861116 0.7010012 0.4938035 #> 4 2 maxstat 0.6017491 0.6661093 0.4999057 #> #> RMSE was used to select the optimal model using the smallest value. #> The final values used for the model were mtry = 1, splitrule = #> extratrees and min.node.size = 3. MLmetrics::RMSE(m$pred$pred, m$pred$obs) #> [1] 0.609202 MLmetrics::R2_Score(m$pred$pred, m$pred$obs) #> [1] 0.642394 的更多信息

.img-responsive。

但我在bootstrap doc上找不到<img class="img-responsive" src="...some link...">。这与我在bootstrap上找到的内容非常接近：https://getbootstrap.com/docs/4.1/content/images/.但是，我能够在w3schools找到它。是因为bootstrap 4.1没有.img-responsive还是我错过了什么？谢谢您的帮助。

Answer 1

.img-responsive已重命名为.img-fluid

在Bootstrap 4.0的文档中，您可以在此处找到它：https://getbootstrap.com/docs/4.0/content/images/#responsive-images

Answer 2

在bootstrap v4.0（或更高版本）中，图像响应.img-fluid类。